diff --git a/flutter_inappwebview_ios/CHANGELOG.md b/flutter_inappwebview_ios/CHANGELOG.md
index 4570737d..ebe7f664 100644
--- a/flutter_inappwebview_ios/CHANGELOG.md
+++ b/flutter_inappwebview_ios/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.6
+
+- Possible fix for "iOS Fatal Crash" [#1894](https://github.com/pichillilorenzo/flutter_inappwebview/issues/1894)
+
 ## 1.0.5
 
 - Call `super.dispose();` on `InAppBrowser` and `ChromeSafari` implementations
diff --git a/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift b/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
index 701a3f41..e3deed4b 100755
--- a/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
+++ b/flutter_inappwebview_ios/ios/Classes/InAppWebView/InAppWebView.swift
@@ -2042,12 +2042,15 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate,
                 return
             }
             
-            // workaround for ProtectionSpace SSL Certificate
-            // https://github.com/pichillilorenzo/flutter_inappwebview/issues/1678
-            DispatchQueue.global(qos: .background).async {
-                if let scheme = challenge.protectionSpace.protocol, scheme == "https",
-                   let sslCertificate = challenge.protectionSpace.sslCertificate {
-                    InAppWebView.sslCertificatesMap[challenge.protectionSpace.host] = sslCertificate
+            if let scheme = challenge.protectionSpace.protocol, scheme == "https" {
+                // workaround for ProtectionSpace SSL Certificate
+                // https://github.com/pichillilorenzo/flutter_inappwebview/issues/1678
+                DispatchQueue.global(qos: .background).async {
+                    if let sslCertificate = challenge.protectionSpace.sslCertificate {
+                        DispatchQueue.main.async {
+                            InAppWebView.sslCertificatesMap[challenge.protectionSpace.host] = sslCertificate
+                        }
+                    }
                 }
             }
             
diff --git a/flutter_inappwebview_ios/pubspec.yaml b/flutter_inappwebview_ios/pubspec.yaml
index 4bc8f33e..fd11fd00 100644
--- a/flutter_inappwebview_ios/pubspec.yaml
+++ b/flutter_inappwebview_ios/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_inappwebview_ios
 description: iOS implementation of the flutter_inappwebview plugin.
-version: 1.0.5
+version: 1.0.6
 homepage: https://inappwebview.dev/
 repository: https://github.com/pichillilorenzo/flutter_inappwebview/tree/master/flutter_inappwebview_ios
 issue_tracker: https://github.com/pichillilorenzo/flutter_inappwebview/issues
diff --git a/flutter_inappwebview_macos/CHANGELOG.md b/flutter_inappwebview_macos/CHANGELOG.md
index d8837312..0370a153 100644
--- a/flutter_inappwebview_macos/CHANGELOG.md
+++ b/flutter_inappwebview_macos/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.4
+
+- Possible fix for "iOS Fatal Crash" [#1894](https://github.com/pichillilorenzo/flutter_inappwebview/issues/1894)
+
 ## 1.0.3
 
 - Call `super.dispose();` on `InAppBrowser` implementation
diff --git a/flutter_inappwebview_macos/macos/Classes/InAppWebView/InAppWebView.swift b/flutter_inappwebview_macos/macos/Classes/InAppWebView/InAppWebView.swift
index 393417a3..25ecf460 100755
--- a/flutter_inappwebview_macos/macos/Classes/InAppWebView/InAppWebView.swift
+++ b/flutter_inappwebview_macos/macos/Classes/InAppWebView/InAppWebView.swift
@@ -1424,12 +1424,15 @@ public class InAppWebView: WKWebView, WKUIDelegate,
                 return
             }
             
-            // workaround for ProtectionSpace SSL Certificate
-            // https://github.com/pichillilorenzo/flutter_inappwebview/issues/1678
-            DispatchQueue.global(qos: .background).async {
-                if let scheme = challenge.protectionSpace.protocol, scheme == "https",
-                   let sslCertificate = challenge.protectionSpace.sslCertificate {
-                    InAppWebView.sslCertificatesMap[challenge.protectionSpace.host] = sslCertificate
+            if let scheme = challenge.protectionSpace.protocol, scheme == "https" {
+                // workaround for ProtectionSpace SSL Certificate
+                // https://github.com/pichillilorenzo/flutter_inappwebview/issues/1678
+                DispatchQueue.global(qos: .background).async {
+                    if let sslCertificate = challenge.protectionSpace.sslCertificate {
+                        DispatchQueue.main.async {
+                            InAppWebView.sslCertificatesMap[challenge.protectionSpace.host] = sslCertificate
+                        }
+                    }
                 }
             }
             
diff --git a/flutter_inappwebview_macos/pubspec.yaml b/flutter_inappwebview_macos/pubspec.yaml
index c4e72d3b..33732b60 100644
--- a/flutter_inappwebview_macos/pubspec.yaml
+++ b/flutter_inappwebview_macos/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_inappwebview_macos
 description: macOS implementation of the flutter_inappwebview plugin.
-version: 1.0.3
+version: 1.0.4
 homepage: https://inappwebview.dev/
 repository: https://github.com/pichillilorenzo/flutter_inappwebview/tree/master/flutter_inappwebview_macos
 issue_tracker: https://github.com/pichillilorenzo/flutter_inappwebview/issues