diff --git a/entrypoint.sh b/entrypoint.sh
index 86c6e3d..632bbbd 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -15,11 +15,14 @@ EOF
 
 if [ -z "$IMAGEAPP" ]; then
     REGISTRY="$(echo "$GITHUB_SERVER_URL" | sed 's .*://  ')"
+    printf '%s' "$INPUT_IMAGE"
+    printf '%s' "$INPUT_IMAGE" | tr '[:upper:]' '[:lower:]' | tr -c '[:lower:][:digit:]-/:_' _
+    printf '%s' "$INPUT_IMAGE" | tr '[:upper:]' '[:lower:]' | tr -c '[:lower:][:digit:]-:_' _
     IMAGEAPP="$REGISTRY/$(printf '%s' "$INPUT_IMAGE" | tr '[:upper:]' '[:lower:]' | tr -c '[:lower:][:digit:]-/:_' _)"
 fi
 
 /kaniko/executor \
-    --cache="${INPUT_CACHE}" \
+    --cache="$INPUT_CACHE" \
     --context "${INPUT_DOCKERFILE%/*}" \
     --dockerfile "$INPUT_DOCKERFILE" \
     --destination "$IMAGEAPP"