diff --git a/sda-download/dev_utils/compose-sda.yml b/sda-download/dev_utils/compose-sda.yml
index 41d3875fd..370de0a6c 100644
--- a/sda-download/dev_utils/compose-sda.yml
+++ b/sda-download/dev_utils/compose-sda.yml
@@ -6,9 +6,9 @@ services:
       - -c
       - |
         cp /origcerts/* /certs
-        chown -R nobody.nobody /certs/*
+        chown -R nobody:nobody /certs/*
         chmod -R og-rw /certs/*-key.pem
-        chown -R 70.70 /certs/db*
+        chown -R 70:70 /certs/db*
         ls -la /certs/
 
     container_name: certfixer
diff --git a/sda-download/dev_utils/compose.yml b/sda-download/dev_utils/compose.yml
index 61eee8a63..f9f7ad954 100644
--- a/sda-download/dev_utils/compose.yml
+++ b/sda-download/dev_utils/compose.yml
@@ -5,10 +5,10 @@ services:
       - -c
       - |
         cp /origcerts/* /certs
-        chown -R nobody.nobody /certs/*
+        chown -R nobody:nobody /certs/*
         chmod -R 644 /certs/*
         chmod -R og-rw /certs/*-key.pem
-        chown -R 70.70 /certs/db*
+        chown -R 70:70 /certs/db*
         ls -la /certs/
 
     container_name: certfixer