diff --git a/Gemfile b/Gemfile
index a90f496..ed301f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -49,7 +49,7 @@ group :test do
   gem "codeclimate-test-reporter",           require: false
 
   # test helpers
-  gem "fixture_builder",           "~> 0.4.1"
+  gem "fixture_builder", git: "https://github.com/rdy/fixture_builder.git", tag: "v0.5.0-rc1"
   gem "factory_girl_rails",        "~> 4.7"
   gem "rspec-collection_matchers", "~> 1.1.2"
   gem "webmock",                   "~> 2.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 0177bcd..ae8bfec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,3 +1,12 @@
+GIT
+  remote: https://github.com/rdy/fixture_builder.git
+  revision: 2ea53a9d8ebd8bc11a3f593aa6436dbf09f7029e
+  tag: v0.5.0-rc1
+  specs:
+    fixture_builder (0.5.0.pre.RC1)
+      activerecord (>= 2)
+      activesupport (>= 2)
+
 PATH
   remote: .
   specs:
@@ -80,9 +89,6 @@ GEM
     faraday_middleware (0.10.0)
       faraday (>= 0.7.4, < 0.10)
     ffi (1.9.14)
-    fixture_builder (0.4.1)
-      activerecord (>= 2)
-      activesupport (>= 2)
     formatador (0.2.5)
     fuubar (2.2.0)
       rspec-core (~> 3.0)
@@ -294,7 +300,7 @@ DEPENDENCIES
   diaspora_federation-rails!
   diaspora_federation-test!
   factory_girl_rails (~> 4.7)
-  fixture_builder (~> 0.4.1)
+  fixture_builder!
   fuubar (= 2.2.0)
   guard-rspec
   guard-rubocop