diff --git a/backend/go.mod b/backend/go.mod
index 59603f43..9e98b8e9 100644
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -2,10 +2,6 @@ module crawlab
 
 go 1.16
 
-replace (
-	github.com/crawlab-team/crawlab-core => ../../crawlab-core
-)
-
 require (
 	github.com/apex/log v1.9.0
 	github.com/crawlab-team/crawlab-core v0.6.0-beta.20211230.1200
diff --git a/scripts/validate-backend.sh b/scripts/validate-backend.sh
index efa197a4..b568de82 100755
--- a/scripts/validate-backend.sh
+++ b/scripts/validate-backend.sh
@@ -6,6 +6,7 @@ content=$(cat ./backend/go.mod)
 for line in $content
 do
 	if [[ $line =~ $pattern ]]; then
+		echo "Invalid ./backend/go.mod, which should not contain \"^replace\""
 		exit 1
 	fi
 done