diff --git a/pythonbuild/downloads.py b/pythonbuild/downloads.py
index aa2c216d..d9060665 100644
--- a/pythonbuild/downloads.py
+++ b/pythonbuild/downloads.py
@@ -157,22 +157,22 @@
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     },
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-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230430/llvm-16.0.2+20230430-gnu_only-x86_64-unknown-linux-gnu.tar.zst",
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-        "version": "16.0.2+20230430",
+        "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",
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     "llvm-aarch64-macos": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230430/llvm-16.0.2+20230430-aarch64-apple-darwin.tar.zst",
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-        "version": "16.0.2+20230430",
+        "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",
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     "llvm-x86_64-macos": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20230430/llvm-16.0.2+20230430-x86_64-apple-darwin.tar.zst",
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-        "version": "16.0.2+20230430",
+        "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,
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+        "version": "16.0.3+20230506",
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     "m4": {
         "url": "https://ftp.gnu.org/gnu/m4/m4-1.4.19.tar.xz",