diff --git a/notebook/Dockerfile b/notebook/Dockerfile
index 98b5754..211bf68 100644
--- a/notebook/Dockerfile
+++ b/notebook/Dockerfile
@@ -157,7 +157,7 @@ COPY worker-template.yml /pre-home
 COPY add_service_creds.py /pre-home
 COPY run_sql_proxy.py /pre-home
 
-COPY config.yml /pre-home
+COPY config.yaml /pre-home
 COPY worker-template.yml /pre-home
 
 
diff --git a/notebook/config.yml b/notebook/config.yaml
similarity index 73%
rename from notebook/config.yml
rename to notebook/config.yaml
index ed5a46c..2b88bc1 100644
--- a/notebook/config.yml
+++ b/notebook/config.yaml
@@ -7,5 +7,5 @@ distributed:
       limit: 5s
 
 kubernetes:
-  worker-template-path: "/home/{NB_USER}/worker-template.yaml"
+  worker-template-path: "/home/{NB_USER}/worker-template.yml"
   name: "dask-{JUPYTERHUB_USER}-{uuid}"
\ No newline at end of file
diff --git a/notebook/prepare.sh b/notebook/prepare.sh
index e85b341..0608e34 100644
--- a/notebook/prepare.sh
+++ b/notebook/prepare.sh
@@ -2,13 +2,14 @@
 
 set -x
 
-echo "Copy files from pre-load directory into home"
-cp --update -r -v /pre-home/. /home/jovyan
-
 echo "Copy Dask configuration files from pre-load directory into home/.config"
 mkdir -p /home/jovyan/.config/dask
-cp --update -r -v /pre-home/config.yml /home/jovyan/.config/dask/
+cp --update -r -v /pre-home/config.yaml /home/jovyan/.config/dask/
 cp --update -r -v /pre-home/worker-template.yml /home/jovyan/.config/dask/
+sudo rm /pre-home/config.yaml
+
+echo "Copy files from pre-load directory into home"
+cp --update -r -v /pre-home/. /home/jovyan
 
 if [[ -e "/opt/app/environment.yml" ]]; then
     echo "environment.yml found. Installing packages";
diff --git a/notebook/run_sql_proxy.py b/notebook/run_sql_proxy.py
index 64dd81c..7450e01 100644
--- a/notebook/run_sql_proxy.py
+++ b/notebook/run_sql_proxy.py
@@ -10,7 +10,7 @@
     SQL_INSTANCE = {project}:{region}:{instance}=tcp:{port}
     SQL_TOKEN_FILE = /path/to/credentials-file.json
 
-modifying the `SQL_INSTANCE` and `SQL_TOKEN_FILE` values to match your server's
+modifying the `SQL_INSTANCE` and `SQL_TOKEN` values to match your server's
 configuration.
 
 Then, run `python run_sql_proxy.py`. This will start an SQL proxy and will also
@@ -36,7 +36,8 @@ def get_sql_service_account_token(sql_token_file):
 
     try:
         with open(sql_token_file, 'r') as f:
-            return f.read()
+            return json.load(f)
+
     except (OSError, IOError):
         return
 
@@ -75,13 +76,13 @@ def __enter__(self):
         for env in worker_template_modified['spec']['containers'][0]['env']:
             if 'SQL_INSTANCE' in env['name']:
                 continue
-            elif 'SQL_TOKEN_FILE' in env['name']:
+            elif 'SQL_TOKEN' in env['name']:
                 continue
             else:
                 env_vars.append(env)
 
         env_vars.append(
-            {'name': 'SQL_TOKEN', 'value': sql_token})
+            {'name': 'SQL_TOKEN', 'value': json.dumps(sql_token)})
 
         env_vars.append(
             {'name': 'SQL_INSTANCE', 'value': sql_instance})
@@ -109,7 +110,7 @@ def maybe_start_sql_proxy(self, sql_instance, sql_token_file):
 
         p.wait()
 
-        
+
     def return_worker_spec_to_original_state(self, *args):
         if self.original_worker_template is None:
             return