diff --git a/cpython-unix/targets.yml b/cpython-unix/targets.yml
index 140fed67..d27d23d0 100644
--- a/cpython-unix/targets.yml
+++ b/cpython-unix/targets.yml
@@ -566,7 +566,7 @@ x86_64-apple-darwin:
   target_cflags:
     - '-arch'
     - 'x86_64'
-    - '-mmacosx-version-min=10.13'
+    - '-mmacosx-version-min=10.13.4'
     # Suppress extremely verbose warnings we see with LLVM 10.
     - '-Wno-nullability-completeness'
     - '-Wno-expansion-to-defined'
@@ -581,7 +581,7 @@ x86_64-apple-darwin:
   target_ldflags:
     - '-arch'
     - 'x86_64'
-    - '-mmacosx-version-min=10.13'
+    - '-mmacosx-version-min=10.13.4'
   needs:
     - autoconf
     - bzip2