Index: pkg/polymer_expressions/pubspec.yaml |
diff --git a/pkg/polymer_expressions/pubspec.yaml b/pkg/polymer_expressions/pubspec.yaml |
index 5b80ae928e56876194fe61441c31b5075dda325c..7fa0ded35d40cbd940a06694967bcb9f57711577 100644 |
--- a/pkg/polymer_expressions/pubspec.yaml |
+++ b/pkg/polymer_expressions/pubspec.yaml |
@@ -10,5 +10,6 @@ dependencies: |
dev_dependencies: |
unittest: ">=0.9.0 <0.10.0" |
benchmark_harness: ">=1.0.0 <2.0.0" |
+ mutation_observer: ">=0.9.0 <2.0.0" |
environment: |
sdk: ">=1.0.0 <2.0.0" |