diff --git a/pyproject.toml b/pyproject.toml
index e2465428d62e1e2aebd44800cca6a565842112b0..70cac0640e8dfb2b045ae566d77fbf23d78d5f0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ secondary = true
 
 [tool.poetry.dependencies]
 python = "^3.9"
-aleksis-core = "^3.0.0.dev0"
+aleksis-core = "^2.12.2"
 aleksis-app-chronos = "^3.0.0.dev0"
 aleksis-app-stoelindeling = { version = "^2.0.0.dev0", optional = true }