diff --git a/fern/apis/api/generators.yml b/fern/apis/api/generators.yml
index bcc38a4..7760cc6 100644
--- a/fern/apis/api/generators.yml
+++ b/fern/apis/api/generators.yml
@@ -53,6 +53,7 @@ groups:
           includeApiReference: true
           extraDependencies:
             '@aws-sdk/client-s3': '^3.540.0'
+          extraDevDependencies:
             'aws-sdk-client-mock': '^4.0.0'
             'aws-sdk-client-mock-jest': '^4.0.0'
         smart-casing: true
@@ -73,6 +74,7 @@ groups:
           includeApiReference: true
           extraDependencies:
             '@aws-sdk/client-s3': '^3.540.0'
+          extraDevDependencies:
             'aws-sdk-client-mock': '^4.0.0'
             'aws-sdk-client-mock-jest': '^4.0.0'
         smart-casing: true