diff --git a/pyproject.toml b/pyproject.toml
index a4419535..643796fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ requires = [
     "cmake>=3.22",
     "pybind11",
     "numpy",
-    "simsimd>=5.6.4",
+    "simsimd>=5.9.3,<6.0.0",
 ]
 build-backend = "setuptools.build_meta"
 
diff --git a/setup.py b/setup.py
index 39d59904..61c85d6d 100644
--- a/setup.py
+++ b/setup.py
@@ -162,7 +162,7 @@ def get_bool_env_w_name(name: str, preference: bool) -> tuple:
 ]
 if use_simsimd:
     include_dirs.append("simsimd/include")
-    install_requires.append("simsimd>=5.6.4")
+    install_requires.append("simsimd>=5.9.3,<6.0.0")
 if use_fp16lib:
     include_dirs.append("fp16/include")
 
diff --git a/simsimd b/simsimd
index 2de0445d..b6185e6e 160000
--- a/simsimd
+++ b/simsimd
@@ -1 +1 @@
-Subproject commit 2de0445d58f593b49cfebfda7ce838d25bb7588f
+Subproject commit b6185e6e3c62426d7bec1892b96c5658f06d5862