diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 792248b..add3c0b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -33,7 +33,7 @@ jobs:
         source_dir: src
         env_vars: >-
           PROJECT_ID=rising-city-366608,
-          COMMA_SEPARATED_TOKEN_WHITELIST=${{ secrets.COMMA_SEPARATED_TOKEN_WHITELIST }},
+          COLON_SEPARATED_TOKEN_WHITELIST=${{ secrets.COLON_SEPARATED_TOKEN_WHITELIST }},
           GITHUB_URL=${{github.server_url}}/${{github.repository}}
         secret_environment_variables: >-
           EGROUPS_USERNAME=projects/74365131111/secrets/EGROUPS_USERNAME,
diff --git a/src/function.go b/src/function.go
index c941516..75d03a8 100644
--- a/src/function.go
+++ b/src/function.go
@@ -110,7 +110,7 @@ func Coffee(writer http.ResponseWriter, request *http.Request) {
 		return
 	}
 
-	unsafeWhitelist := strings.Split(os.Getenv("COMMA_SEPARATED_TOKEN_WHITELIST"), ",")
+	unsafeWhitelist := strings.Split(os.Getenv("COLON_SEPARATED_TOKEN_WHITELIST"), ":")
 	whitelist := omitEmptyStrings(unsafeWhitelist)
 
 	if !contains(whitelist, incomingMsg.Token) {