diff --git a/pkgs/mockito/CHANGELOG.md b/pkgs/mockito/CHANGELOG.md
index b9c93e9d0..b280afd61 100644
--- a/pkgs/mockito/CHANGELOG.md
+++ b/pkgs/mockito/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 5.4.5
+## 5.4.5-dev.0
 
 * Ignore "must_be_immutable" warning in generated files. Mocks cannot be made
   immutable anyway, but this way users aren't prevented from using generated
diff --git a/pkgs/mockito/pubspec.yaml b/pkgs/mockito/pubspec.yaml
index de86fd90e..d177db12b 100644
--- a/pkgs/mockito/pubspec.yaml
+++ b/pkgs/mockito/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mockito
-version: 5.4.5
+version: 5.4.5-dev.0
 description: >-
   A mock framework inspired by Mockito with APIs for Fakes, Mocks,
   behavior verification, and stubbing.