diff --git a/README.md b/README.md
index ed4f23f..49d6611 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 </div>
 
 <p align="center">
-<img src="https://img.shields.io/badge/coverage-_%25-green?style=for-the-badge" alt="coverage: 0%">
+<img src="https://img.shields.io/badge/coverage-_%25-red?style=for-the-badge" alt="coverage">
 <a href="https://flutter-news-app-full-source-code.github.io/docs/api-server/local-setup/"><img src="https://img.shields.io/badge/DOCUMENTATION-READ-slategray?style=for-the-badge" alt="Documentation: Read"></a>
 </p>
 <p align="center">
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 803eb63..6f69771 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,4 +1,4 @@
-include: package:very_good_analysis/analysis_options.7.0.0.yaml
+include: package:very_good_analysis/analysis_options.9.0.0.yaml
 analyzer:
   errors:
     avoid_redundant_argument_values: ignore
diff --git a/lib/src/config/environment_config.dart b/lib/src/config/environment_config.dart
index 71babc7..01cb664 100644
--- a/lib/src/config/environment_config.dart
+++ b/lib/src/config/environment_config.dart
@@ -15,7 +15,7 @@ abstract final class EnvironmentConfig {
 
   // The DotEnv instance is now loaded via a helper method to make it more
   // resilient to current working directory issues.
-  static final _env = _loadEnv();
+  static final DotEnv _env = _loadEnv();
 
   /// Helper method to load the .env file more robustly.
   ///
diff --git a/lib/src/registry/model_registry.dart b/lib/src/registry/model_registry.dart
index 046559d..d4a3c7b 100644
--- a/lib/src/registry/model_registry.dart
+++ b/lib/src/registry/model_registry.dart
@@ -459,4 +459,4 @@ typedef ModelRegistryMap = Map<String, ModelConfig<dynamic>>;
 /// This makes the `modelRegistry` map available for injection into the
 /// request context via `context.read<ModelRegistryMap>()`. It's primarily
 /// used by the middleware in `routes/api/v1/data/_middleware.dart`.
-final modelRegistryProvider = provider<ModelRegistryMap>((_) => modelRegistry);
+final Middleware modelRegistryProvider = provider<ModelRegistryMap>((_) => modelRegistry);
diff --git a/pubspec.lock b/pubspec.lock
index d816ff0..21a7955 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -117,8 +117,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: d7d9afa3e0cf8fb211fdea3342db8831813abf7d
+      ref: "828b984517edec069266579c624c7af9fbe0e2ac"
+      resolved-ref: "828b984517edec069266579c624c7af9fbe0e2ac"
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
     version: "0.0.0"
@@ -158,8 +158,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: "2cbe263418a214838e2ac84d0db8911520d14a3e"
+      ref: "960a00882045ee252274d9d57bfca606c1fe5d64"
+      resolved-ref: "960a00882045ee252274d9d57bfca606c1fe5d64"
       url: "https://github.com/flutter-news-app-full-source-code/data-client.git"
     source: git
     version: "0.0.0"
@@ -167,8 +167,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: "113c1874dc7baa964d0c41640a09c8cac64a685a"
+      ref: ee2ace6243f1ad4710c192c36215d3ce9e91c7a3
+      resolved-ref: ee2ace6243f1ad4710c192c36215d3ce9e91c7a3
       url: "https://github.com/flutter-news-app-full-source-code/data-mongodb.git"
     source: git
     version: "0.0.0"
@@ -176,8 +176,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: d9fbbf33d8bb53724e2dd29d488a0c8eb9cbf6e8
+      ref: f8f01f1191286efbba41fa2bb369fb16eb652ccf
+      resolved-ref: f8f01f1191286efbba41fa2bb369fb16eb652ccf
       url: "https://github.com/flutter-news-app-full-source-code/data-repository.git"
     source: git
     version: "0.0.0"
@@ -225,8 +225,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: "422f8c6442be166b503ba1cdcb1a0170f3fbe71f"
+      ref: c5e36d06b58918056dde4a58d177a39fb66bfe24
+      resolved-ref: c5e36d06b58918056dde4a58d177a39fb66bfe24
       url: "https://github.com/flutter-news-app-full-source-code/email-client.git"
     source: git
     version: "0.0.0"
@@ -234,8 +234,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: f09f7868b9f0ffbe90f3c8e1c12655356a86dcfb
+      ref: a68acd99c37b844af4eb3ed9f2eb9fd494c57f73
+      resolved-ref: a68acd99c37b844af4eb3ed9f2eb9fd494c57f73
       url: "https://github.com/flutter-news-app-full-source-code/email-repository.git"
     source: git
     version: "0.0.0"
@@ -243,8 +243,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: "80606a93d3f1ab5ac57123cd89ed4a04a43203df"
+      ref: "4cd256b1a65a648db2519d8b26b4e9174d4d3a0c"
+      resolved-ref: "4cd256b1a65a648db2519d8b26b4e9174d4d3a0c"
       url: "https://github.com/flutter-news-app-full-source-code/email-sendgrid.git"
     source: git
     version: "0.0.0"
@@ -316,8 +316,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
-      resolved-ref: be0149d0eebab781a5ffefe5c6475d3bd1be56a6
+      ref: "57f6bcfc0f209ecc135fdcb688194045ec87e6e8"
+      resolved-ref: "57f6bcfc0f209ecc135fdcb688194045ec87e6e8"
       url: "https://github.com/flutter-news-app-full-source-code/http-client.git"
     source: git
     version: "0.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 6a05a55..b29a480 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,30 +11,38 @@ dependencies:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
+      ref: 828b984517edec069266579c624c7af9fbe0e2ac
   dart_frog: ^1.1.0
   dart_jsonwebtoken: ^3.2.0
   data_client:
     git:
       url: https://github.com/flutter-news-app-full-source-code/data-client.git
+      ref: 960a00882045ee252274d9d57bfca606c1fe5d64
   data_mongodb:
     git:
       url: https://github.com/flutter-news-app-full-source-code/data-mongodb.git
+      ref: ee2ace6243f1ad4710c192c36215d3ce9e91c7a3
   data_repository:
     git:
       url: https://github.com/flutter-news-app-full-source-code/data-repository.git
+      ref: f8f01f1191286efbba41fa2bb369fb16eb652ccf
   dotenv: ^4.2.0
   email_client:
     git:
       url: https://github.com/flutter-news-app-full-source-code/email-client.git
+      ref: c5e36d06b58918056dde4a58d177a39fb66bfe24
   email_repository:
     git:
       url: https://github.com/flutter-news-app-full-source-code/email-repository.git
+      ref: a68acd99c37b844af4eb3ed9f2eb9fd494c57f73
   email_sendgrid:
     git:
       url: https://github.com/flutter-news-app-full-source-code/email-sendgrid.git
+      ref: 4cd256b1a65a648db2519d8b26b4e9174d4d3a0c
   http_client:
     git:
       url: https://github.com/flutter-news-app-full-source-code/http-client.git
+      ref: 57f6bcfc0f209ecc135fdcb688194045ec87e6e8
   json_annotation: ^4.9.0
   logging: ^1.3.0
   meta: ^1.16.0