diff --git a/entrypoint.sh b/entrypoint.sh
index 8f16aed..a0ef47f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -10,8 +10,8 @@ fi
 # default to latest
 TFSEC_VERSION="latest"
 
-# if INPUT_TFSEC_VERSION set and not latests
-if [ -n "${INPUT_TFSEC_VERSION}" && "$INPUT_TFSEC_VERSION" != "latest" ]; then
+# if INPUT_TFSEC_VERSION set and not latest
+if [[ -n "${INPUT_TFSEC_VERSION}" && "$INPUT_TFSEC_VERSION" != "latest" ]]; then
   TFSEC_VERSION="tags/${INPUT_TFSEC_VERSION}"
 fi