1 files changed, 6 insertions, 0 deletions

diff --git a/readme.md b/readme.md
index 420120d..da79939 100644
--- a/readme.md
+++ b/readme.md
@@ -23,6 +23,12 @@ the relevant range below:
     Python: 20000-29999
     Robot:  30000-39999
 
+Problem group IDs should be chosen from the range:
+
+    Prolog: 1000-1999
+    Python: 2000-2999
+    Robot:  3000-3999
+
 Running `scripts/build\_web\_resources.py` in the codeq-server repo
 will generate JSON files for all problems, and insert new problems, groups and
 languages in the database.