diff --git a/cs3/identity/group/v1beta1/resources.proto b/cs3/identity/group/v1beta1/resources.proto
index 5416a920..116643b5 100644
--- a/cs3/identity/group/v1beta1/resources.proto
+++ b/cs3/identity/group/v1beta1/resources.proto
@@ -25,7 +25,7 @@ option go_package = "groupv1beta1";
 option java_multiple_files = true;
 option java_outer_classname = "ResourcesProto";
 option java_package = "com.cs3.identity.group.v1beta1";
-option objc_class_prefix = "CIU";
+option objc_class_prefix = "CIG";
 option php_namespace = "Cs3\\Identity\\Group\\V1Beta1";
 
 import "cs3/identity/user/v1beta1/resources.proto";
diff --git a/cs3/identity/user/v1beta1/resources.proto b/cs3/identity/user/v1beta1/resources.proto
index 1d1ddd3d..703a48d6 100644
--- a/cs3/identity/user/v1beta1/resources.proto
+++ b/cs3/identity/user/v1beta1/resources.proto
@@ -25,7 +25,7 @@ option go_package = "userv1beta1";
 option java_multiple_files = true;
 option java_outer_classname = "ResourcesProto";
 option java_package = "com.cs3.identity.user.v1beta1";
-option objc_class_prefix = "CIU";
+option objc_class_prefix = "CIG";
 option php_namespace = "Cs3\\Identity\\User\\V1Beta1";
 
 import "cs3/types/v1beta1/types.proto";
diff --git a/cs3/identity/user/v1beta1/user_api.proto b/cs3/identity/user/v1beta1/user_api.proto
index e6dafbf1..5678962d 100644
--- a/cs3/identity/user/v1beta1/user_api.proto
+++ b/cs3/identity/user/v1beta1/user_api.proto
@@ -25,7 +25,7 @@ option go_package = "userv1beta1";
 option java_multiple_files = true;
 option java_outer_classname = "UserApiProto";
 option java_package = "com.cs3.identity.user.v1beta1";
-option objc_class_prefix = "CIU";
+option objc_class_prefix = "CIG";
 option php_namespace = "Cs3\\Identity\\User\\V1Beta1";
 
 import "cs3/identity/user/v1beta1/resources.proto";
diff --git a/proto.lock b/proto.lock
index 542f5199..d5543cd4 100644
--- a/proto.lock
+++ b/proto.lock
@@ -1859,7 +1859,7 @@
           },
           {
             "name": "objc_class_prefix",
-            "value": "CIU"
+            "value": "CIG"
           },
           {
             "name": "php_namespace",
@@ -1970,7 +1970,7 @@
           },
           {
             "name": "objc_class_prefix",
-            "value": "CIU"
+            "value": "CIG"
           },
           {
             "name": "php_namespace",
@@ -2243,7 +2243,7 @@
           },
           {
             "name": "objc_class_prefix",
-            "value": "CIU"
+            "value": "CIG"
           },
           {
             "name": "php_namespace",