diff --git a/crates/vite_global_cli/src/commands/upgrade/registry.rs b/crates/vite_global_cli/src/commands/upgrade/registry.rs
index 021b0399f2..170ac257c3 100644
--- a/crates/vite_global_cli/src/commands/upgrade/registry.rs
+++ b/crates/vite_global_cli/src/commands/upgrade/registry.rs
@@ -45,7 +45,8 @@ pub async fn resolve_version(
     registry_override: Option<&str>,
 ) -> Result<ResolvedVersion, Error> {
     let default_registry = npm_registry();
-    let registry = registry_override.unwrap_or(&default_registry);
+    let registry_raw = registry_override.unwrap_or(&default_registry);
+    let registry = registry_raw.trim_end_matches('/');
     let client = HttpClient::new();
 
     // Step 1: Fetch main package metadata to resolve version
diff --git a/crates/vite_shared/src/env_config.rs b/crates/vite_shared/src/env_config.rs
index 7d0b4fdf85..a7fe0bfac5 100644
--- a/crates/vite_shared/src/env_config.rs
+++ b/crates/vite_shared/src/env_config.rs
@@ -133,7 +133,9 @@ impl EnvConfig {
             vite_plus_home: std::env::var(env_vars::VITE_PLUS_HOME).ok().map(PathBuf::from),
             npm_registry: std::env::var(env_vars::NPM_CONFIG_REGISTRY)
                 .or_else(|_| std::env::var(env_vars::NPM_CONFIG_REGISTRY_UPPER))
-                .unwrap_or_else(|_| "https://registry.npmjs.org".into()),
+                .unwrap_or_else(|_| "https://registry.npmjs.org".into())
+                .trim_end_matches('/')
+                .to_string(),
             node_dist_mirror: std::env::var(env_vars::VITE_NODE_DIST_MIRROR).ok(),
             is_ci: std::env::var("CI").is_ok(),
             bypass_shim: std::env::var(env_vars::VITE_PLUS_BYPASS).is_ok(),