diff --git a/README.md b/README.md
index 2e1257b..0b173ac 100644
--- a/README.md
+++ b/README.md
@@ -13,4 +13,5 @@ vfox add nodejs
 ## Mirror
 
 You can configure the mirror by `VFOX_NODEJS_MIRROR` environment variable. The default value
-is `https://nodejs.org/dist/`.
+is `https://nodejs.org/dist`. Trailing slashes are automatically handled, so both
+`https://nodejs.org/dist` and `https://nodejs.org/dist/` will work correctly.
diff --git a/lib/util.lua b/lib/util.lua
index 0c09de2..c063c13 100644
--- a/lib/util.lua
+++ b/lib/util.lua
@@ -9,7 +9,8 @@ function UTIL.getBaseUrl()
     if mirror == "" or mirror == nil then
         return "https://nodejs.org/dist"
     end
-    return mirror
+    -- Strip trailing slash to avoid double slashes in URL paths
+    return mirror:gsub("/$", "")
 end
 
 function UTIL.compare_versions(v1o, v2o)