diff --git a/mergin/common.py b/mergin/common.py
index 297ec3e1..05596cf2 100644
--- a/mergin/common.py
+++ b/mergin/common.py
@@ -14,6 +14,7 @@
 class ErrorCode(Enum):
     ProjectsLimitHit = "ProjectsLimitHit"
     StorageLimitHit = "StorageLimitHit"
+    MonthlyContributorsError = "MonthlyContributorsError"
 
 
 class ClientError(Exception):