diff --git a/cmake/CPM.cmake b/cmake/CPM.cmake
index f4d0eea4..9570d497 100644
--- a/cmake/CPM.cmake
+++ b/cmake/CPM.cmake
@@ -150,6 +150,18 @@ set(CPM_DRY_RUN
     OFF
     CACHE INTERNAL "Don't download or configure dependencies (for testing)"
 )
+set(CPM_GITHUB_REPOSITORY_URL
+    "github.com"
+    CACHE INTERNAL ""
+)
+set(CPM_GITLAB_REPOSITORY_URL
+    "gitlab.com"
+    CACHE INTERNAL ""
+)
+set(CPM_BITBUCKET_REPOSITORY_URL
+    "bitbucket.org"
+    CACHE INTERNAL ""
+)
 
 if(DEFINED ENV{CPM_SOURCE_CACHE})
   set(CPM_SOURCE_CACHE_DEFAULT $ENV{CPM_SOURCE_CACHE})
@@ -561,11 +573,11 @@ function(CPMAddPackage)
   endif()
 
   if(DEFINED CPM_ARGS_GITHUB_REPOSITORY)
-    set(CPM_ARGS_GIT_REPOSITORY "https://github.com/${CPM_ARGS_GITHUB_REPOSITORY}.git")
+    set(CPM_ARGS_GIT_REPOSITORY "https://${CPM_GITHUB_REPOSITORY_URL}/${CPM_ARGS_GITHUB_REPOSITORY}.git")
   elseif(DEFINED CPM_ARGS_GITLAB_REPOSITORY)
-    set(CPM_ARGS_GIT_REPOSITORY "https://gitlab.com/${CPM_ARGS_GITLAB_REPOSITORY}.git")
+    set(CPM_ARGS_GIT_REPOSITORY "https://${CPM_GITLAB_REPOSITORY_URL}/${CPM_ARGS_GITLAB_REPOSITORY}.git")
   elseif(DEFINED CPM_ARGS_BITBUCKET_REPOSITORY)
-    set(CPM_ARGS_GIT_REPOSITORY "https://bitbucket.org/${CPM_ARGS_BITBUCKET_REPOSITORY}.git")
+    set(CPM_ARGS_GIT_REPOSITORY "https://${CPM_BITBUCKET_REPOSITORY_URL}/${CPM_ARGS_BITBUCKET_REPOSITORY}.git")
   endif()
 
   if(DEFINED CPM_ARGS_GIT_REPOSITORY)