diff --git a/pyproject.toml b/pyproject.toml
index a0d90c2f1..02333b688 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -77,7 +77,7 @@ full = [
 
 # Development tools and testing
 dev = [
-    "tsam==3.1.2",  # Time series aggregation for clustering
+    "tsam==3.3.0",  # Time series aggregation for clustering
     "pytest==9.0.2",
     "pytest-xdist==3.8.0",
     "nbformat==5.10.4",