diff --git a/pythonbuild/downloads.py b/pythonbuild/downloads.py
index 8942210b..85ded62b 100644
--- a/pythonbuild/downloads.py
+++ b/pythonbuild/downloads.py
@@ -156,23 +156,23 @@
         "sha256": "04cb77c660f09df017a57738ae9635ef23a506024789f2f18da1304b45af2023",
         "version": "14.0.3+20220508",
     },
-    "llvm-16-x86_64-linux": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230506/llvm-16.0.3+20230506-gnu_only-x86_64-unknown-linux-gnu.tar.zst",
-        "size": 226142860,
-        "sha256": "5fbddd82919fb855684aa79c4f862248e1ceda9334259062803965e5d3d264d4",
-        "version": "16.0.3+2023506",
+    "llvm-17-x86_64-linux": {
+        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230926/llvm-17.0.1+20230926-gnu_only-x86_64-unknown-linux-gnu.tar.zst",
+        "size": 229558479,
+        "sha256": "427cc6f515f1fff87710cc264fb235570e245678fe0f655fad26d78f61fcb016",
+        "version": "17.0.1+20230926",
     },
     "llvm-aarch64-macos": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230506/llvm-16.0.3+20230506-aarch64-apple-darwin.tar.zst",
-        "size": 116375025,
-        "sha256": "f8353cbeadc4be9d83a2b0ae1dc48efe80a4700dac5bd6bdc8058b9144336479",
-        "version": "16.0.3+20230506",
+        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230926/llvm-17.0.1+20230926-aarch64-apple-darwin.tar.zst",
+        "size": 122177218,
+        "sha256": "089cacac70eee3d3b9104d86783f7eed6795b8e4330d9e91b9813669da7082db",
+        "version": "17.0.1+20230926",
     },
     "llvm-x86_64-macos": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230506/llvm-16.0.3+20230506-x86_64-apple-darwin.tar.zst",
-        "size": 123709633,
-        "sha256": "59b9d16f27383444ec458eb116778e871c2e23e92f6704c319f7ab5747a3e26e",
-        "version": "16.0.3+20230506",
+        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230926/llvm-17.0.1+20230926-x86_64-apple-darwin.tar.zst",
+        "size": 127465475,
+        "sha256": "a650fc238ddd197ce85a54d38b92d40f297344839612f5236596a989d7bcba34",
+        "version": "17.0.1+20230926",
     },
     "m4": {
         "url": "https://ftp.gnu.org/gnu/m4/m4-1.4.19.tar.xz",
diff --git a/pythonbuild/utils.py b/pythonbuild/utils.py
index 71e8b4aa..3dd9f90c 100644
--- a/pythonbuild/utils.py
+++ b/pythonbuild/utils.py
@@ -398,7 +398,7 @@ def clang_toolchain(host_platform: str, target_triple: str) -> str:
         if "musl" in target_triple:
             return "llvm-14-x86_64-linux"
         else:
-            return "llvm-16-x86_64-linux"
+            return "llvm-17-x86_64-linux"
     elif host_platform == "macos":
         if platform.mac_ver()[2] == "arm64":
             return "llvm-aarch64-macos"