diff --git a/README.md b/README.md
index d697b56..7c3c61b 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,7 @@ Support for the GCC toolchain varies across GitHub-hosted runner images.
 |:-------------|:--------|:--------|:--------|:--------|:--------|:--------|:--------|
 | macos-11     | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
 | macos-12     | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
+| macos-13     | &check; | &check; | &check; | &check; | &check; | &check; | &check; |
 | ubuntu-20.04 |      | &check; | &check; | &check; | &check; | &check; |      |
 | ubuntu-22.04 |      |      |      | &check; | &check; | &check; | &check; |
 | windows-2019 |      |      | &check; | &check; | &check; | &check; | &check; |
diff --git a/compat.csv b/compat.csv
index 7b1632d..5c6431d 100644
--- a/compat.csv
+++ b/compat.csv
@@ -1,6 +1,7 @@
 runner,6,7,8,9,10,11,12
 macos-11,&check;,&check;,&check;,&check;,&check;,&check;,&check;
 macos-12,&check;,&check;,&check;,&check;,&check;,&check;,&check;
+macos-13,&check;,&check;,&check;,&check;,&check;,&check;,&check;
 ubuntu-20.04,,&check;,&check;,&check;,&check;,&check;,
 ubuntu-22.04,,,,&check;,&check;,&check;,&check;
 windows-2019,,,&check;,&check;,&check;,&check;,&check;