diff --git a/entrypoint.sh b/entrypoint.sh
old mode 100644
new mode 100755
index c424ae4..d8e8717
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,7 +1,15 @@
 #!/bin/sh -l
 
-if [ ! -z $INPUT_STRICT ]; then
+if [ ! -z "$INPUT_STRICT" ]; then
     STRICT="-s"
 fi
 
-yamllint $INPUT_CONFIG_FILE $INPUT_CONFIG_DATA $INPUT_FORMAT $STRICT $INPUT_FILE_OR_DIR 
+if [ ! -z "$INPUT_CONFIG_FILE" ]; then
+    CONFIG_FILE="-c $INPUT_CONFIG_FILE"
+fi
+
+if [ ! -z "$INPUT_CONFIG_DATA" ]; then
+    CONFIG_DATA="-d $INPUT_CONFIG_DATA"
+fi
+
+yamllint $CONFIG_FILE $CONFIG_DATA $INPUT_FORMAT $STRICT $INPUT_FILE_OR_DIR