diff --git a/src/extension.ts b/src/extension.ts
index 48eb524..61a1636 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -173,7 +173,11 @@ async function githubinator({
         !!permalink || branchName == null
           ? createSha(head)
           : createBranch(branchName),
-      relativeFilePath: getRelativeFilePath(gitDir, fileName),
+      // escape invalid url characters
+      // See https://github.com/chdsbd/vscode-githubinator/issues/28
+      relativeFilePath: encodeURIComponent(
+        getRelativeFilePath(gitDir, fileName),
+      ),
     })
     if (parsedUrl != null) {
       console.log("Found provider", provider.name)