diff --git a/pyproject.toml b/pyproject.toml
index e2222a5e9ec6588a019d177ec402672c0effaaf2..9ff420af8e5c743e7ca25f02cb1f6feba6a79e42 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ python = "^3.9"
 aleksis-core = "^2.1.dev0"
 
 [tool.poetry.dev-dependencies]
-aleksis-builddeps = "*"
+aleksis-builddeps = "^6"
 matrix-synapse = "^1.49.2"
 pytest-xprocess = "^0.18.1"