diff --git a/README.md b/README.md
index c3400ec0..8f9f4d76 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ The CEF binaries used by CEF4Delphi are available for download at spotify :
 * [64 bits](http://opensource.spotify.com/cefbuilds/cef_binary_83.4.2%2Bgc8d4f85%2Bchromium-83.0.4103.106_windows64.tar.bz2)
 
 
-CEF4Delphi was developed and tested on Delphi 10.4 and it has been tested in Delphi 7, Delphi XE, Delphi 10, Delphi 10.2, Delphi 10.3 and Lazarus 2.0.8/FPC 3.0.4. CEF4Delphi includes VCL, FireMonkey (FMX) and Lazarus components.
+CEF4Delphi was developed and tested on Delphi 10.4 and it has been tested in Delphi 7, Delphi XE, Delphi 10, Delphi 10.2, Delphi 10.3 and Lazarus 2.0.10/FPC 3.2.0. CEF4Delphi includes VCL, FireMonkey (FMX) and Lazarus components.
 
 ## Links
 * [Installation instructions and more information about CEF4Delphi](https://www.briskbard.com/index.php?lang=en&pageid=cef)
diff --git a/source/uCEFChromiumCore.pas b/source/uCEFChromiumCore.pas
index 1560bf49..a9f50d3f 100644
--- a/source/uCEFChromiumCore.pas
+++ b/source/uCEFChromiumCore.pas
@@ -1423,8 +1423,13 @@ end;
 
 procedure TChromiumCore.DestroyMediaObserver;
 begin
-  FMediaObserver    := nil;
   FMediaObserverReg := nil;
+
+  if (FMediaObserver <> nil) then
+    begin
+      FMediaObserver.DestroyOtherRefs;
+      FMediaObserver := nil;
+    end;
 end;
 
 procedure TChromiumCore.CreateMediaObserver;
@@ -1436,8 +1441,13 @@ end;
 
 procedure TChromiumCore.DestroyDevToolsMsgObserver;
 begin
-  FDevToolsMsgObserver    := nil;
   FDevToolsMsgObserverReg := nil;
+
+  if (FDevToolsMsgObserver <> nil) then
+    begin
+      FDevToolsMsgObserver.DestroyOtherRefs;
+      FDevToolsMsgObserver := nil;
+    end;
 end;
 
 procedure TChromiumCore.CreateDevToolsMsgObserver;
diff --git a/update_CEF4Delphi.json b/update_CEF4Delphi.json
index 0b8c73bd..ac47dd51 100644
--- a/update_CEF4Delphi.json
+++ b/update_CEF4Delphi.json
@@ -2,7 +2,7 @@
   "UpdateLazPackages" : [
     {
       "ForceNotify" : true,
-      "InternalVersion" : 157,
+      "InternalVersion" : 158,
       "Name" : "cef4delphi_lazarus.lpk",
       "Version" : "83.4.2.0"
     }