diff --git a/dagger.nimble b/dagger.nimble
index 64051489..a37f75f2 100644
--- a/dagger.nimble
+++ b/dagger.nimble
@@ -14,4 +14,5 @@ requires "nim >= 1.2.6",
          "stew#head",
          "protobufserialization >= 0.2.0 & < 0.3.0",
          "https://github.com/status-im/nim-nitro >= 0.1.0 & < 0.2.0",
+         "questionable >= 0.4.3 & < 0.5.0",
          "asynctest >= 0.2.1 & < 0.3.0"