diff --git a/Gemfile b/Gemfile
index 73142e9b7..032f94b43 100644
--- a/Gemfile
+++ b/Gemfile
@@ -63,7 +63,6 @@ gem 'rails'
 gem 'rails-i18n' # Locales par défaut
 gem 'rake-progressbar', require: false
 gem 'react-rails'
-gem 'rest-client'
 gem 'rgeo-geojson'
 gem 'sanitize-url'
 gem 'sassc-rails' # Use SCSS for stylesheets
diff --git a/Gemfile.lock b/Gemfile.lock
index 62899d419..a13bb0995 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -793,7 +793,6 @@ DEPENDENCIES
   rails-i18n
   rake-progressbar
   react-rails
-  rest-client
   rgeo-geojson
   rspec-rails (~> 4.0.0.beta)
   rspec_junit_formatter
diff --git a/app/controllers/champs/carte_controller.rb b/app/controllers/champs/carte_controller.rb
index 059c4554f..3fdd88b7b 100644
--- a/app/controllers/champs/carte_controller.rb
+++ b/app/controllers/champs/carte_controller.rb
@@ -62,7 +62,7 @@ class Champs::CarteController < ApplicationController
       @champ.save
     end
 
-  rescue RestClient::ResourceNotFound
+  rescue ApiCarto::API::ResourceNotFound
     flash.alert = 'Les données cartographiques sont temporairement indisponibles. Réessayez dans un instant.'
     response.status = 503
   end
diff --git a/app/controllers/champs/siret_controller.rb b/app/controllers/champs/siret_controller.rb
index f78a35fb6..0eabd821e 100644
--- a/app/controllers/champs/siret_controller.rb
+++ b/app/controllers/champs/siret_controller.rb
@@ -16,7 +16,7 @@ class Champs::SiretController < ApplicationController
 
     begin
       etablissement = find_etablissement_with_siret
-    rescue RestClient::RequestFailed
+    rescue ApiEntreprise::API::RequestFailed
       return siret_error(:network_error)
     end
     if etablissement.blank?
diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index e66aaf44b..2e70cd862 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -106,7 +106,7 @@ module Users
       sanitized_siret = siret_model.siret
       begin
         etablissement_attributes = ApiEntrepriseService.get_etablissement_params_for_siret(sanitized_siret, @dossier.procedure.id)
-      rescue RestClient::RequestFailed
+      rescue ApiEntreprise::API::RequestFailed
         return render_siret_error(t('errors.messages.siret_network_error'))
       end
       if etablissement_attributes.blank?
diff --git a/app/lib/api_carto/api.rb b/app/lib/api_carto/api.rb
index eadb813f8..865a8b192 100644
--- a/app/lib/api_carto/api.rb
+++ b/app/lib/api_carto/api.rb
@@ -1,4 +1,7 @@
 class ApiCarto::API
+  class ResourceNotFound < StandardError
+  end
+
   def self.search_qp(geojson)
     url = [API_CARTO_URL, "quartiers-prioritaires", "search"].join("/")
     call(url, geojson)
@@ -19,7 +22,7 @@ class ApiCarto::API
     else
       message = response.code == 0 ? response.return_message : response.code.to_s
       Rails.logger.error "[ApiCarto] Error on #{url}: #{message}"
-      raise RestClient::ResourceNotFound
+      raise ResourceNotFound
     end
   end
 end
diff --git a/app/lib/api_entreprise/adapter.rb b/app/lib/api_entreprise/adapter.rb
index 8c4b21de4..4e26e8a1f 100644
--- a/app/lib/api_entreprise/adapter.rb
+++ b/app/lib/api_entreprise/adapter.rb
@@ -9,7 +9,7 @@ class ApiEntreprise::Adapter
   def data_source
     begin
       @data_source ||= get_resource
-    rescue RestClient::ResourceNotFound
+    rescue ApiEntreprise::API::ResourceNotFound
       @data_source = nil
     end
   end
diff --git a/app/lib/api_entreprise/api.rb b/app/lib/api_entreprise/api.rb
index 818d1e833..69304366a 100644
--- a/app/lib/api_entreprise/api.rb
+++ b/app/lib/api_entreprise/api.rb
@@ -6,6 +6,12 @@ class ApiEntreprise::API
 
   TIMEOUT = 15
 
+  class ResourceNotFound < StandardError
+  end
+
+  class RequestFailed < StandardError
+  end
+
   def self.entreprise(siren, procedure_id)
     call(ENTREPRISE_RESOURCE_NAME, siren, procedure_id)
   end
@@ -35,9 +41,9 @@ class ApiEntreprise::API
     if response.success?
       JSON.parse(response.body, symbolize_names: true)
     elsif response.code&.between?(401, 499)
-      raise RestClient::ResourceNotFound
+      raise ResourceNotFound
     else
-      raise RestClient::RequestFailed
+      raise RequestFailed
     end
   end
 
diff --git a/app/lib/pipedrive/api.rb b/app/lib/pipedrive/api.rb
index c537a4e50..2c4201e7f 100644
--- a/app/lib/pipedrive/api.rb
+++ b/app/lib/pipedrive/api.rb
@@ -51,20 +51,29 @@ class Pipedrive::API
       api_token: token
     })
 
-    response = RestClient.get(url, params: params)
-    JSON.parse(response.body)['data']
+    response = Typhoeus.get(url, params: params)
+
+    if response.success?
+      JSON.parse(response.body)['data']
+    end
   end
 
   def self.put(url, params)
-    url = "#{url}?api_token=#{token}"
-
-    RestClient.put(url, params.to_json, { content_type: :json })
+    Typhoeus.put(
+      url,
+      params: { api_token: token },
+      body: params.to_json,
+      headers: { 'content-type' => 'application/json' }
+    )
   end
 
   def self.post(url, params)
-    url = "#{url}?api_token=#{token}"
-
-    RestClient.post(url, params.to_json, { content_type: :json })
+    Typhoeus.post(
+      url,
+      params: { api_token: token },
+      body: params.to_json,
+      headers: { 'content-type' => 'application/json' }
+    )
   end
 
   def self.token
diff --git a/app/services/api_entreprise_service.rb b/app/services/api_entreprise_service.rb
index feb687544..32fa8ada7 100644
--- a/app/services/api_entreprise_service.rb
+++ b/app/services/api_entreprise_service.rb
@@ -4,7 +4,7 @@ class ApiEntrepriseService
   # Returns nil if the SIRET is unknown; and nested params
   # suitable for being saved into a Etablissement object otherwise.
   #
-  # Raises a RestClient::RequestFailed exception on transcient errors
+  # Raises a ApiEntreprise::API::RequestFailed exception on transcient errors
   # (timeout, 5XX HTTP error code, etc.)
   def self.get_etablissement_params_for_siret(siret, procedure_id)
     etablissement_params = ApiEntreprise::EtablissementAdapter.new(siret, procedure_id).to_params
@@ -14,13 +14,13 @@ class ApiEntrepriseService
       begin
         association_params = ApiEntreprise::RNAAdapter.new(siret, procedure_id).to_params
         etablissement_params.merge!(association_params)
-      rescue RestClient::RequestFailed
+      rescue ApiEntreprise::API::RequestFailed
       end
 
       begin
         exercices_params = ApiEntreprise::ExercicesAdapter.new(siret, procedure_id).to_params
         etablissement_params.merge!(exercices_params)
-      rescue RestClient::RequestFailed
+      rescue ApiEntreprise::API::RequestFailed
       end
 
       etablissement_params.merge(entreprise_params)
diff --git a/spec/controllers/champs/carte_controller_spec.rb b/spec/controllers/champs/carte_controller_spec.rb
index e420323f6..dbba13ebb 100644
--- a/spec/controllers/champs/carte_controller_spec.rb
+++ b/spec/controllers/champs/carte_controller_spec.rb
@@ -75,7 +75,7 @@ describe Champs::CarteController, type: :controller do
 
         allow_any_instance_of(ApiCarto::QuartiersPrioritairesAdapter)
           .to receive(:results)
-          .and_raise(RestClient::ResourceNotFound)
+          .and_raise(ApiCarto::API::ResourceNotFound)
 
         post :show, params: params, format: 'js'
       end
diff --git a/spec/controllers/champs/siret_controller_spec.rb b/spec/controllers/champs/siret_controller_spec.rb
index e374ce4a1..cd7163803 100644
--- a/spec/controllers/champs/siret_controller_spec.rb
+++ b/spec/controllers/champs/siret_controller_spec.rb
@@ -59,7 +59,7 @@ describe Champs::SiretController, type: :controller do
         let(:siret) { '82161143100015' }
 
         before do
-          allow(controller).to receive(:find_etablissement_with_siret).and_raise(RestClient::RequestFailed)
+          allow(controller).to receive(:find_etablissement_with_siret).and_raise(ApiEntreprise::API::RequestFailed)
         end
 
         subject! { get :show, params: params, format: 'js' }
diff --git a/spec/lib/api_carto/api_spec.rb b/spec/lib/api_carto/api_spec.rb
index 2e52a58b1..bb03c40e5 100644
--- a/spec/lib/api_carto/api_spec.rb
+++ b/spec/lib/api_carto/api_spec.rb
@@ -15,8 +15,8 @@ describe ApiCarto::API do
       let(:status) { 404 }
       let(:body) { '' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiCarto::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiCarto::API::ResourceNotFound)
       end
     end
 
@@ -25,8 +25,8 @@ describe ApiCarto::API do
       let(:status) { 500 }
       let(:body) { 'toto' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiCarto::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiCarto::API::ResourceNotFound)
       end
     end
 
@@ -63,8 +63,8 @@ describe ApiCarto::API do
       let(:status) { 404 }
       let(:body) { '' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiCarto::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiCarto::API::ResourceNotFound)
       end
     end
 
diff --git a/spec/lib/api_carto/cadastre_adapter_spec.rb b/spec/lib/api_carto/cadastre_adapter_spec.rb
index aaba3cae7..63d7f83c9 100644
--- a/spec/lib/api_carto/cadastre_adapter_spec.rb
+++ b/spec/lib/api_carto/cadastre_adapter_spec.rb
@@ -60,6 +60,6 @@ describe ApiCarto::CadastreAdapter do
     let(:status) { 404 }
     let(:body) { '' }
 
-    it { expect { subject }.to raise_error(RestClient::ResourceNotFound) }
+    it { expect { subject }.to raise_error(ApiCarto::API::ResourceNotFound) }
   end
 end
diff --git a/spec/lib/api_carto/quartiers_prioritaires_adapter_spec.rb b/spec/lib/api_carto/quartiers_prioritaires_adapter_spec.rb
index 32f5eb60b..70593327d 100644
--- a/spec/lib/api_carto/quartiers_prioritaires_adapter_spec.rb
+++ b/spec/lib/api_carto/quartiers_prioritaires_adapter_spec.rb
@@ -33,6 +33,6 @@ describe ApiCarto::QuartiersPrioritairesAdapter do
     let(:status) { 404 }
     let(:body) { '' }
 
-    it { expect { subject }.to raise_error(RestClient::ResourceNotFound) }
+    it { expect { subject }.to raise_error(ApiCarto::API::ResourceNotFound) }
   end
 end
diff --git a/spec/lib/api_entreprise/api_spec.rb b/spec/lib/api_entreprise/api_spec.rb
index abd7c07c2..e4453ad99 100644
--- a/spec/lib/api_entreprise/api_spec.rb
+++ b/spec/lib/api_entreprise/api_spec.rb
@@ -16,8 +16,8 @@ describe ApiEntreprise::API do
       let(:status) { 502 }
       let(:body) { File.read('spec/fixtures/files/api_entreprise/entreprises_unavailable.json') }
 
-      it 'raises RestClient::RequestFailed' do
-        expect { subject }.to raise_error(RestClient::RequestFailed)
+      it 'raises ApiEntreprise::API::RequestFailed' do
+        expect { subject }.to raise_error(ApiEntreprise::API::RequestFailed)
       end
     end
 
@@ -26,8 +26,8 @@ describe ApiEntreprise::API do
       let(:status) { 404 }
       let(:body) { File.read('spec/fixtures/files/api_entreprise/entreprises_not_found.json') }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiEntreprise::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiEntreprise::API::ResourceNotFound)
       end
     end
 
@@ -36,8 +36,8 @@ describe ApiEntreprise::API do
       let(:status) { 403 }
       let(:body) { File.read('spec/fixtures/files/api_entreprise/entreprises_private.json') }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiEntreprise::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiEntreprise::API::ResourceNotFound)
       end
     end
 
@@ -64,8 +64,8 @@ describe ApiEntreprise::API do
       let(:status) { 404 }
       let(:body) { '' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiEntreprise::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiEntreprise::API::ResourceNotFound)
       end
     end
 
@@ -93,8 +93,8 @@ describe ApiEntreprise::API do
       let(:status) { 404 }
       let(:body) { '' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiEntreprise::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiEntreprise::API::ResourceNotFound)
       end
     end
 
@@ -105,7 +105,7 @@ describe ApiEntreprise::API do
       let(:status) { 200 }
       let(:body) { File.read('spec/fixtures/files/api_entreprise/exercices.json') }
 
-      it 'raises RestClient::Unauthorized' do
+      it 'success' do
         expect(subject).to eq(JSON.parse(body, symbolize_names: true))
       end
     end
@@ -124,8 +124,8 @@ describe ApiEntreprise::API do
       let(:status) { 404 }
       let(:body) { '' }
 
-      it 'raises RestClient::ResourceNotFound' do
-        expect { subject }.to raise_error(RestClient::ResourceNotFound)
+      it 'raises ApiEntreprise::API::ResourceNotFound' do
+        expect { subject }.to raise_error(ApiEntreprise::API::ResourceNotFound)
       end
     end
 
diff --git a/spec/lib/api_entreprise/entreprise_adapter_spec.rb b/spec/lib/api_entreprise/entreprise_adapter_spec.rb
index 51f120d2d..56c78d8aa 100644
--- a/spec/lib/api_entreprise/entreprise_adapter_spec.rb
+++ b/spec/lib/api_entreprise/entreprise_adapter_spec.rb
@@ -84,7 +84,7 @@ describe ApiEntreprise::EntrepriseAdapter do
     let(:status) { 502 }
 
     it 'raises an exception' do
-      expect { subject }.to raise_error(RestClient::RequestFailed)
+      expect { subject }.to raise_error(ApiEntreprise::API::RequestFailed)
     end
   end
 end
diff --git a/spec/services/api_entreprise_service_spec.rb b/spec/services/api_entreprise_service_spec.rb
index 0fefcb99e..192f16400 100644
--- a/spec/services/api_entreprise_service_spec.rb
+++ b/spec/services/api_entreprise_service_spec.rb
@@ -66,8 +66,8 @@ describe ApiEntrepriseService do
       let(:entreprises_status) { 400 }
       let(:entreprises_body) { '' }
 
-      it 'should raise RestClient::RequestFailed' do
-        expect { result }.to raise_error(RestClient::RequestFailed)
+      it 'should raise ApiEntreprise::API::RequestFailed' do
+        expect { result }.to raise_error(ApiEntreprise::API::RequestFailed)
       end
     end
 
@@ -75,8 +75,8 @@ describe ApiEntrepriseService do
       let(:etablissements_status) { 400 }
       let(:etablissements_body) { '' }
 
-      it 'should raise RestClient::RequestFailed' do
-        expect { result }.to raise_error(RestClient::RequestFailed)
+      it 'should raise ApiEntreprise::API::RequestFailed' do
+        expect { result }.to raise_error(ApiEntreprise::API::RequestFailed)
       end
     end