diff --git a/3rdparty/quickjs-wz b/3rdparty/quickjs-wz
index 163ce747d27..6b630270b1f 160000
--- a/3rdparty/quickjs-wz
+++ b/3rdparty/quickjs-wz
@@ -1 +1 @@
-Subproject commit 163ce747d271dfc3cfdc0dac92e342390c445ffd
+Subproject commit 6b630270b1f430012ce0aa0a0079b9b618bbaa7d
diff --git a/lib/wzmaplib/src/map_script.cpp b/lib/wzmaplib/src/map_script.cpp
index 615e8e6aa5e..19f794012f1 100644
--- a/lib/wzmaplib/src/map_script.cpp
+++ b/lib/wzmaplib/src/map_script.cpp
@@ -713,7 +713,7 @@ std::shared_ptr<Map> runMapScript(const std::vector<char>& fileBuffer, const std
 		JS_FreeRuntime2(rt, QJSRuntimeFree_LeakHandler_Warning);
 		pRuntimeFree_CustomLogger = nullptr;
 	});
-	JSLimitedContextOptions ctxOptions;
+	JSLimitedContextOptions ctxOptions = { };
 	ctxOptions.baseObjects = true;
 	ctxOptions.dateObject = false;
 	ctxOptions.eval = false;
@@ -724,6 +724,7 @@ std::shared_ptr<Map> runMapScript(const std::vector<char>& fileBuffer, const std
 	ctxOptions.mapSet = true;
 	ctxOptions.typedArrays = false;
 	ctxOptions.promise = false;
+	ctxOptions.bigInt = false;
 	JSContext *ctx = JS_NewLimitedContext(rt, &ctxOptions);
 	if (ctx == nullptr)
 	{
diff --git a/src/quickjs_backend.cpp b/src/quickjs_backend.cpp
index 2c22772f1ef..5633b037d64 100644
--- a/src/quickjs_backend.cpp
+++ b/src/quickjs_backend.cpp
@@ -152,7 +152,7 @@ class quickjs_scripting_instance : public wzapi::scripting_instance
 		rt = JS_NewRuntime();
 		ASSERT(rt != nullptr, "JS_NewRuntime failed?");
 
-		JSLimitedContextOptions ctxOptions;
+		JSLimitedContextOptions ctxOptions = { };
 		ctxOptions.baseObjects = true;
 		ctxOptions.dateObject = true;
 		ctxOptions.eval = (game.type == LEVEL_TYPE::CAMPAIGN); // allow "eval" only for campaign (which currently has lots of implicit eval usage)
@@ -163,6 +163,7 @@ class quickjs_scripting_instance : public wzapi::scripting_instance
 		ctxOptions.mapSet = true;
 		ctxOptions.typedArrays = true;
 		ctxOptions.promise = false; // disable promise, async, await
+		ctxOptions.bigInt = false;
 		ctx = JS_NewLimitedContext(rt, &ctxOptions);
 		ASSERT(ctx != nullptr, "JS_NewContext failed?");