diff --git a/mod/provider/cloudfront.js b/mod/provider/cloudfront.js
index 59e39ad44..bc45241d5 100644
--- a/mod/provider/cloudfront.js
+++ b/mod/provider/cloudfront.js
@@ -11,7 +11,7 @@ module.exports = async ref => {
   try {
 
     // Subtitutes {*} with process.env.SRC_* key values.
-    const url = (ref.params?.url || ref).replace(/{(.*?)}/g,
+    const url = (ref.params?.url || ref).replace(/[{](.*?)[}]/g,
       matched => process.env[`SRC_${matched.replace(/(^{)|(}$)/g, '')}`])
 
     const date = new Date(Date.now())
diff --git a/mod/provider/file.js b/mod/provider/file.js
index 170a2882f..424f6c0c6 100644
--- a/mod/provider/file.js
+++ b/mod/provider/file.js
@@ -6,7 +6,7 @@ module.exports = async ref => {
   try {
 
     // Subtitutes {*} with process.env.SRC_* key values.
-    const path = (ref.params?.url || ref).replace(/{(.*?)}/g,
+    const path = (ref.params?.url || ref).replace(/[{](.*?)[}]/g,
       matched => process.env[`SRC_${matched.replace(/(^{)|(}$)/g, '')}`])
 
     const file = readFileSync(join(__dirname, `../../${path}`))