diff --git a/bin/slurm_calibrate.sh b/bin/slurm_calibrate.sh
index 14e6d96d6cb1a2ce719fac2cf8c4521d6c909c6e..01026e9afd89c560d6e435edf08efc4fcdc45610 100755
--- a/bin/slurm_calibrate.sh
+++ b/bin/slurm_calibrate.sh
@@ -50,8 +50,7 @@ then
   ${python_path} -m calparrot --port-file $port_file
   calparrot_port=$(cat $port_file)
   rm $port_file
-  export CAL_CAL_TOOLS_CALCAT__base-api-url="http://127.0.0.1:${calparrot_port}"
-  export CAL_CAL_TOOLS_CALCAT__use-oauth2=false
+  export CAL_CAL_TOOLS_CALCAT="{base-api-url='http://127.0.0.1:${calparrot_port}/api', use-oauth2=false}"
 fi
 
 echo "Running notebook"