diff --git a/data/category-cas b/data/category-cas
new file mode 100644
index 00000000..cb14c04b
--- /dev/null
+++ b/data/category-cas
@@ -0,0 +1,17 @@
+# This list contains well-known Certificate Authorities (CA) outside China mainland.
+
+# Reference: https://en.wikipedia.org/wiki/Certificate_authority
+include:buypass
+include:comodo
+include:cybertrust
+include:digicert
+include:entrust
+include:globalsign
+include:identrust
+include:letsencrypt
+include:secom
+include:sectigo
+include:swisssign
+include:telekom
+include:trustwave
+include:verisign
diff --git a/data/geolocation-!cn b/data/geolocation-!cn
index 3d045a65..12854f04 100644
--- a/data/geolocation-!cn
+++ b/data/geolocation-!cn
@@ -32,21 +32,7 @@ include:quantil
 include:stackpath
 
 # Certificate authorities
-# Reference: https://en.wikipedia.org/wiki/Certificate_authority
-include:buypass
-include:comodo
-include:cybertrust
-include:digicert
-include:entrust
-include:globalsign
-include:identrust
-include:letsencrypt
-include:secom
-include:sectigo
-include:swisssign
-include:telekom
-include:trustwave
-include:verisign
+include:category-cas
 
 # Communications
 include:discord