diff --git a/pyproject.toml b/pyproject.toml
index 4a9557789..76bb3ba9e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,11 +27,13 @@ classifiers = [
 ]
 dynamic = ["version"]
 dependencies = [
-    # Memory issue: tilelang#1502
-    "apache-tvm-ffi~=0.1.0,>=0.1.6",
+    # >=0.1.6 fixes a memory issue: tilelang#1502, but keep
+    # requirement as wide as possible to be compatible with other libraries
+    # pip will try to use latest version whenever possible.
+    "apache-tvm-ffi~=0.1.0,>=0.1.2",
     # torch-c-dlpack-ext provides prebuilt torch extensions.
     # Without it, TVM FFI may require JIT compilation on first import.
-    "torch-c-dlpack-ext",
+    "torch-c-dlpack-ext; python_version < '3.14'",
     "cloudpickle",
     "ml-dtypes",
     "numpy>=1.23.5",
@@ -42,7 +44,7 @@ dependencies = [
     "setuptools; platform_system == 'Darwin'",
     "tqdm>=4.62.3",
     "typing-extensions>=4.10.0",
-    "z3-solver>=4.13.0",
+    "z3-solver>=4.13.0,<4.15.5",
 ]
 
 [project.optional-dependencies]
@@ -61,7 +63,7 @@ nvcc = [
 requires = [
     "cython>=3.1.0",
     "scikit-build-core",
-    "z3-solver>=4.13.0",
+    "z3-solver>=4.13.0,<4.15.5",
     # Not for auditwheel, explicitly add patchelf for repairing libz3.so.
     # See tvm's CMakeLists.txt for more information.
     "patchelf>=0.17.2; platform_system == 'Linux'",