diff --git a/python/pyproject.toml b/python/pyproject.toml
index 89267f397..2650861a8 100755
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
   "flash-attn-4>=4.0.0b18",
   "flashinfer_python[cu13]==0.6.15.post1", # keep it aligned with jit-cache version in Dockerfile
   "gguf",
-  "helion==0.2.6",
+  "helion==1.4",
   "humming-kernels[cu13]==0.1.10",
   "interegular",
   "IPython",
diff --git a/python/pyproject_other.toml b/python/pyproject_other.toml
index 61aeb106e..fa7ee033a 100755
--- a/python/pyproject_other.toml
+++ b/python/pyproject_other.toml
@@ -30,7 +30,7 @@ runtime_common = [
   "einops",
   "fastapi",
   "gguf",
-  "helion==0.2.6",
+  "helion==1.4",
   "interegular",
   "IPython",
   "llguidance>=1.7.6,<2.0.0",