diff --git a/private/lib/windows/x86_64/rktwebview.dll b/private/lib/windows/x86_64/rktwebview.dll
index 21a44db..49f11b4 100644
Binary files a/private/lib/windows/x86_64/rktwebview.dll and b/private/lib/windows/x86_64/rktwebview.dll differ
diff --git a/private/lib/windows/x86_64/rktwebview_test.exe b/private/lib/windows/x86_64/rktwebview_test.exe
index 2a1ab41..93ebe2c 100644
Binary files a/private/lib/windows/x86_64/rktwebview_test.exe and b/private/lib/windows/x86_64/rktwebview_test.exe differ
diff --git a/private/racket-webview-qt.rkt b/private/racket-webview-qt.rkt
index be8fbc2..3240ae3 100644
--- a/private/racket-webview-qt.rkt
+++ b/private/racket-webview-qt.rkt
@@ -4,6 +4,7 @@
          ffi/unsafe/define
          ffi/unsafe/atomic
          ffi/unsafe/os-thread
+         ffi/unsafe/cvector
          racket/async-channel
          racket/runtime-path
          racket/port
@@ -131,35 +132,6 @@
                              "QtWebEngineProcess.exe"
                              "QtWebEngineProcess"))
 
-(set! quiet-call
-      (when (or (eq? os 'windows) (eq? os 'linux))
-        (putenv "QT_PLUGIN_PATH"
-                (path->string (build-path os-lib-dir)))
-        (putenv "QTWEBENGINEPROCESS_PATH"
-                (path->string (build-path os-lib-dir webengine-process)))
-        (putenv "QTWEBENGINE_RESOURCES_PATH"
-                (path->string (build-path os-lib-dir "resources")))
-        (putenv "QTWEBENGINE_LOCALES_PATH"
-                (path->string (build-path os-lib-dir "translations" "qtwebengine_locales")))
-        (putenv "RKT_WEBVIEW_PRG"
-                (let ((p 
-                (path->string (build-path os-lib-dir rktwebview-prg)))
-                      )
-                  (displayln p)
-                  p
-                  ))
-        (when (eq? os 'linux)
-          (putenv "QT_QPA_PLATFORM" "xcb")
-          (putenv "LD_LIBRARY_PATH"
-                  (string-append
-                   (path->string (build-path os-lib-dir)) ":"
-                   (path->string (build-path os-lib-dir "platforms"))
-                   )
-                  )
-          )
-        )
-      )
-      
 ;;; Preload libraries
 
 #|
@@ -209,6 +181,8 @@
 
 (define-ffi-definer define-rktwebview webview-lib)
 
+
+
 ;;; Callbacks from the OS library
 
 ;(define callback-box (box '()))
@@ -300,6 +274,9 @@
    )
   )
 
+;RKTWEBVIEW_EXPORT void rkt_webview_env(const char *env_cmds[]);
+(define-rktwebview rkt_webview_env
+  (_fun _cvector -> _void))
 
 ;RKTWEBVIEW_QT_EXPORT void rkt_webview_init(int &argc, char **argv);
 (define-rktwebview rkt_webview_init
@@ -458,6 +435,34 @@
 ;                                'done)))))
 ;              (f)))))
 
+(define rkt_env
+  (when (or (eq? os 'windows) (eq? os 'linux))
+    (let ((env (list (string-append "QT_PLUGIN_PATH=" (path->string (build-path os-lib-dir)))
+                     (string-append "QTWEBENGINEPROCESS_PATH=" (path->string (build-path os-lib-dir webengine-process)))
+                     (string-append "QTWEBENGINE_RESOURCES_PATH=" (path->string (build-path os-lib-dir "resources")))
+                     (string-append "QTWEBENGINE_LOCALES_PATH=" (path->string (build-path os-lib-dir "translations" "qtwebengine_locales")))
+                     (string-append "RKT_WEBVIEW_PRG=" (path->string (build-path os-lib-dir rktwebview-prg))))))
+      (when (eq? os 'linux)
+        (set! env (append
+                   env
+                   (list
+                    (string-append "QT_QPA_PLATFORM=" "xcb")
+                    (string-append "LD_LIBRARY_PATH="
+                                   (string-append
+                                    (path->string (build-path os-lib-dir)) ":"
+                                    (path->string (build-path os-lib-dir "platforms"))
+                                    )))))
+        )
+      (append env (list #f)))))
+
+;(define env_array (_array _string/utf-8 (length rkt_env)))
+
+;(let ((i 0))
+;  (while (< i (length rkt_env))
+;         (array-set! env_array i (list-ref rkt_env i))
+;         (set! i (+ i 1))))
+
+(rkt_webview_env (list->cvector rkt_env _string/utf-8))
 (rkt_webview_init)
 
 
@@ -493,7 +498,7 @@
                                    (set! waiting (- waiting 1))
                                    )
                             )
-                          (sleep 0.001)
+                          (sleep 0.005)
                           (f))
                         ))
               (f)))
diff --git a/rktwebview_qt/rktwebview.cpp b/rktwebview_qt/rktwebview.cpp
index 3bba070..4d62fe5 100644
--- a/rktwebview_qt/rktwebview.cpp
+++ b/rktwebview_qt/rktwebview.cpp
@@ -526,3 +526,15 @@ rkt_data_t *rkt_webview_get_event()
         return nullptr;
     }
 }
+
+void rkt_webview_env(const char *env_cmds[])
+{
+    int i;
+    for(i = 0; env_cmds[i] != nullptr && strcmp(env_cmds[i], "") != 0; i++) {
+#ifdef WIN32
+        _putenv(env_cmds[i]);
+#else
+        putenv(env_cmds[i]);
+#endif
+    }
+}
diff --git a/rktwebview_qt/rktwebview.h b/rktwebview_qt/rktwebview.h
index 902a7d2..5bd8fd2 100644
--- a/rktwebview_qt/rktwebview.h
+++ b/rktwebview_qt/rktwebview.h
@@ -10,6 +10,7 @@
 
 extern "C" {
 
+RKTWEBVIEW_EXPORT void rkt_webview_env(const char *env_cmds[]);
 RKTWEBVIEW_EXPORT void rkt_webview_init();
 RKTWEBVIEW_EXPORT void rkt_webview_cleanup();
 //RKTWEBVIEW_EXPORT void rkt_webview_process_events(int for_ms);