diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0aebe04..070bcd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## 1.9.26
+
+- `Initializable` mixin:
+  - `ensureInitialized`: added `onError` handler to `then` call to route errors to `_onInitializationError`.
+  - `executeInitializedCallback`:
+    - Added `onError` handler to `then` call on async initialization result to throw `InitializationError` with stack trace.
+  - `_FutureExtension`:
+    - `toCompleter`: added `onError` handler to `then` to complete completer with error and stack trace if not completed.
+
 ## 1.9.25
 
 - `TableFieldReference`:
diff --git a/lib/src/bones_api_base.dart b/lib/src/bones_api_base.dart
index 4a67dac..89d361d 100644
--- a/lib/src/bones_api_base.dart
+++ b/lib/src/bones_api_base.dart
@@ -48,7 +48,7 @@ typedef APILogger =
 /// Bones API Library class.
 class BonesAPI {
   // ignore: constant_identifier_names
-  static const String VERSION = '1.9.25';
+  static const String VERSION = '1.9.26';
 
   static bool _boot = false;
 
diff --git a/lib/src/bones_api_initializable.dart b/lib/src/bones_api_initializable.dart
index 6dea8c4..b6dd44f 100644
--- a/lib/src/bones_api_initializable.dart
+++ b/lib/src/bones_api_initializable.dart
@@ -1009,7 +1009,7 @@ mixin Initializable {
         }
 
         return _finalizeInitializationWithDeps2(depsResults, result);
-      });
+      }, onError: (e, s) => _onInitializationError(e, s));
     } else {
       return _finalizeInitializationWithDeps2(depsResults, result);
     }
@@ -1107,13 +1107,21 @@ mixin Initializable {
     var ret = ensureInitialized(parent: parent);
 
     if (ret is Future<InitializationResult>) {
-      return ret.then((result) {
-        if (!result.ok) {
-          _forceLogFlushMessages();
+      return ret.then(
+        (result) {
+          if (!result.ok) {
+            _forceLogFlushMessages();
+            throw InitializationError(
+              this,
+              "Error initializing (async): $this",
+            );
+          }
+          return callback();
+        },
+        onError: (e, s) {
           throw InitializationError(this, "Error initializing (async): $this");
-        }
-        return callback();
-      });
+        },
+      );
     } else {
       if (!ret.ok) {
         _forceLogFlushMessages();
@@ -1284,11 +1292,18 @@ extension _FutureExtension<T> on Future<T> {
   Completer<T> toCompleter() {
     var completer = Completer<T>();
     // ignore: discarded_futures
-    then((val) {
-      if (!completer.isCompleted) {
-        completer.complete(val);
-      }
-    });
+    then(
+      (val) {
+        if (!completer.isCompleted) {
+          completer.complete(val);
+        }
+      },
+      onError: (e, s) {
+        if (!completer.isCompleted) {
+          completer.completeError(e, s);
+        }
+      },
+    );
     return completer;
   }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 95b738f..1f0a323 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: bones_api
 description: Bones_API - A powerful API backend framework for Dart. It comes with a built-in HTTP Server, route handler, entity handler, SQL translator, and DB adapters.
-version: 1.9.25
+version: 1.9.26
 homepage: https://github.com/Colossus-Services/bones_api
 
 environment: