diff --git a/Cargo.toml b/Cargo.toml
index c3395c5..137b60f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,5 +22,5 @@ url = { version = '2.3.1' }
 webbrowser = { version = '0.8.2' }
 
 [dev-dependencies]
-test-case = { version = '3.1.0' }
+test-case = { version = '3.0.0' }
 mockall = { version = '0.11.4', features = ["nightly"] }