diff --git a/changelog.md b/changelog.md
index 04755ec5..ab789807 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,9 @@
+v6.3.2 - 06/06/22
+==========
+
+- fix: if --runtimeVerison must be explicitly specified if building for a different runtime
+- Update baseurl for electron mirror
+
 v6.3.1 - 05/06/22
 ==========
 
diff --git a/lib/runtimePaths.js b/lib/runtimePaths.js
index 7c88d258..e2200094 100644
--- a/lib/runtimePaths.js
+++ b/lib/runtimePaths.js
@@ -5,7 +5,7 @@ let semver = require("semver");
 
 let NODE_MIRROR = process.env.NVM_NODEJS_ORG_MIRROR || "https://nodejs.org/dist";
 let IOJS_MIRROR = process.env.NVM_IOJS_ORG_MIRROR || "https://iojs.org/dist";
-let ELECTRON_MIRROR = process.env.ELECTRON_MIRROR || "https://atom.io/download/atom-shell";
+let ELECTRON_MIRROR = process.env.ELECTRON_MIRROR || "https://artifacts.electronjs.org/headers/dist";
 
 let runtimePaths = {
     node: function (targetOptions) {
diff --git a/lib/targetOptions.js b/lib/targetOptions.js
index 593c876b..5dc8c822 100644
--- a/lib/targetOptions.js
+++ b/lib/targetOptions.js
@@ -35,7 +35,11 @@ Object.defineProperties(TargetOptions.prototype, {
     },
     runtimeVersion: {
         get: function () {
-            return this.options.runtimeVersion || environment.runtimeVersion;
+            if (this.runtime != environment.runtime && !this.options.runtimeVersion) {
+                throw new Error(`Missing runtimeVersion. It must be specified when specifying the runtime`)
+            } else {
+                return this.options.runtimeVersion || environment.runtimeVersion;
+            }
         }
     }
 });
diff --git a/package.json b/package.json
index 22d45fe2..49efaab1 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "boost"
   ],
   "main": "lib",
-  "version": "6.3.1",
+  "version": "6.3.2",
   "author": "Gábor Mező aka unbornchikken",
   "repository": {
     "type": "git",