diff --git a/app/tasks/maintenance/rotate_api_particulier_token_encryption_task.rb b/app/tasks/maintenance/rotate_api_particulier_token_encryption_task.rb
new file mode 100644
index 000000000..a47c6e132
--- /dev/null
+++ b/app/tasks/maintenance/rotate_api_particulier_token_encryption_task.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module Maintenance
+  class RotateAPIParticulierTokenEncryptionTask < MaintenanceTasks::Task
+    def collection
+      # rubocop:disable DS/Unscoped
+      Procedure.unscoped.where.not(encrypted_api_particulier_token: nil)
+      # rubocop:enable DS/Unscoped
+    end
+
+    def process(procedure)
+      decrypted_token = procedure.api_particulier_token
+
+      procedure.api_particulier_token = decrypted_token
+      procedure.save!(validate: false)
+    end
+
+    def count
+      collection.count
+    end
+  end
+end
diff --git a/spec/tasks/maintenance/rotate_api_particulier_token_encryption_task_spec.rb b/spec/tasks/maintenance/rotate_api_particulier_token_encryption_task_spec.rb
new file mode 100644
index 000000000..a1d08e4ad
--- /dev/null
+++ b/spec/tasks/maintenance/rotate_api_particulier_token_encryption_task_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+module Maintenance
+  RSpec.describe RotateAPIParticulierTokenEncryptionTask do
+    describe "#process" do
+      subject { described_class.process(procedure) }
+      let(:token) { "secret-token-0123456789" }
+      let(:procedure) { create(:procedure) }
+      let(:legacy_encryption_service) do
+        EncryptionService.new.tap { |legacy_service|
+          legacy_key = ActiveSupport::KeyGenerator
+            .new(Rails.application.secrets.secret_key_base, hash_digest_class: OpenSSL::Digest::SHA1)
+            .generate_key(Rails.application.secrets.encryption_service_salt, ActiveSupport::MessageEncryptor.key_len)
+          legacy_encryptor = ActiveSupport::MessageEncryptor.new(legacy_key)
+          legacy_service.instance_variable_set(:@encryptor, legacy_encryptor)
+        }
+      end
+
+      before do
+        # Encrypt the token using the legacy (SHA1) encryption service
+        legacy_encrypted_token = legacy_encryption_service.encrypt(token)
+        procedure.update_column(:encrypted_api_particulier_token, legacy_encrypted_token)
+      end
+
+      it 're-encrypts the api_particulier_token' do
+        old_encrypted_value = procedure.encrypted_api_particulier_token
+
+        expect { subject }.to change { procedure.reload.encrypted_api_particulier_token }
+        expect(procedure.api_particulier_token).to eq(token)
+
+        encrypted_value = procedure.encrypted_api_particulier_token
+
+        # Verify that the new encrypted value can't be decrypted with the legacy service
+        expect { legacy_encryption_service.decrypt(encrypted_value) }
+          .to raise_error(ActiveSupport::MessageEncryptor::InvalidMessage)
+
+        # Verify that the new encrypted value can be decrypted with the current service
+        current_service = EncryptionService.new
+        expect(current_service.decrypt(encrypted_value)).to eq(token)
+
+        # and with the services without rotations
+        current_service = EncryptionService.new
+        current_service.instance_variable_set(:@rotations, [])
+        expect(current_service.decrypt(encrypted_value)).to eq(token)
+      end
+    end
+  end
+end