diff --git a/source_gen/source_gen/.travis.yml b/source_gen/source_gen/.travis.yml
index f2c59f050..46fdab598 100644
--- a/source_gen/source_gen/.travis.yml
+++ b/source_gen/source_gen/.travis.yml
@@ -1,7 +1,8 @@
 language: dart
 sudo: false
+# Unpin SDK after https://github.com/dart-lang/sdk/issues/31940
 dart:
-  - dev
+  - "dev/release/2.0.0-dev.17.0"
   - stable
   - 1.22.1
 dart_task:
diff --git a/source_gen/source_gen/CHANGELOG.md b/source_gen/source_gen/CHANGELOG.md
index 5fb32315e..22478756b 100644
--- a/source_gen/source_gen/CHANGELOG.md
+++ b/source_gen/source_gen/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 0.7.4-dev
+## 0.7.4
 
 * Added `typeNameOf`, which is a safe way to get the name of a `DartType`,
   even when the type is a `FunctionType`, which has a `null` name in newer
@@ -8,6 +8,8 @@
   `export` path necessary to reach the provided URL from the current library.
   Also added `pathToAsset` and `pathToElement` as convenience functions.
 
+* Expanded `package:build` support to allow version `0.12.0`.
+
 ## 0.7.3
 
 * Allow null and empty outputs form `GeneratorForAnnotation`.
diff --git a/source_gen/source_gen/pubspec.yaml b/source_gen/source_gen/pubspec.yaml
index 4077f981f..91b51c240 100644
--- a/source_gen/source_gen/pubspec.yaml
+++ b/source_gen/source_gen/pubspec.yaml
@@ -1,5 +1,5 @@
 name: source_gen
-version: 0.7.3
+version: 0.7.4
 author: Dart Team <misc@dartlang.org>
 description: Automated source code generation for Dart.
 homepage: https://github.com/dart-lang/source_gen
@@ -7,13 +7,13 @@ environment:
   sdk: '>=1.22.1 <2.0.0'
 dependencies:
   analyzer: '>=0.29.10 <0.31.0'
-  build: '>=0.10.0 <0.12.0'
+  build: '>=0.10.0 <0.13.0'
   dart_style: '>=0.1.7 <2.0.0'
   meta: ^1.1.0
   path: ^1.3.2
   source_span: ^1.4.0
 dev_dependencies:
-  build_test: ^0.9.0
+  build_test: ">0.9.0 <0.11.0"
   collection: ^1.1.2
   cli_util: '>=0.1.0 <0.2.0'
   logging: ^0.11.3