diff --git a/build/ansible/roles/loki/files/Dockerfile.loki b/build/ansible/roles/loki/files/Dockerfile.loki
index 3d8ebaa94c..4f187d4221 100644
--- a/build/ansible/roles/loki/files/Dockerfile.loki
+++ b/build/ansible/roles/loki/files/Dockerfile.loki
@@ -1,7 +1,7 @@
 # TODO: the image should be percona/pmm-server:3 once PMM v3 is released.
 
-# To build the image, run the following in the project root directory:
-# docker buildx build --platform=linux/amd64 --progress plain -t perconalab/pmm-server:loki-3.2 -f ./build/ansible/roles/loki/files/Dockerfile.loki . # mind the dot
+# To build the image, run the following in the project root directory (mind the dot):
+# docker buildx build --platform=linux/amd64 --progress plain -t perconalab/pmm-server:loki-3.2 -f ./build/ansible/roles/loki/files/Dockerfile.loki .
 FROM perconalab/pmm-server:3-dev-latest
 
 ENV GF_ANALYTICS_CHECK_FOR_UPDATES=false
diff --git a/build/ansible/roles/loki/files/nginx.conf b/build/ansible/roles/loki/files/nginx.conf
index e9c9c67fa5..a3ef9cc7ab 100644
--- a/build/ansible/roles/loki/files/nginx.conf
+++ b/build/ansible/roles/loki/files/nginx.conf
@@ -23,22 +23,21 @@ http {
                       '$status $body_bytes_sent "$http_referer" '
                       '"$http_user_agent" "$http_x_forwarded_for"';
 
-    log_format json_format escape=json '{'
-        '"time_local": "$time_local",'
-        '"host": "$http_host",'
-        '"remote_addr": "$remote_addr",'
-        '"request_method": "$request_method",'
-        '"request": "$request_uri",'
-        '"request_time": "$request_time",'
-        '"body_bytes_sent": "$body_bytes_sent",'
-        '"server_protocol": "$server_protocol",'
-        '"status": "$status",'
-        '"http_referrer":"$http_referer",'
-        '"http_x_forwarded_for": "$http_x_forwarded_for",'
-        '"http_user_agent": "$http_user_agent"'
-    '}';
-
-    access_log  /dev/stdout  json_format;
+    log_format ext_format
+        'time="$time_iso8601" '
+        'host=$http_host '
+        'remote_addr=$remote_addr '
+        'request_method=$request_method '
+        'request="$request_uri" '
+        'request_time=$request_time '
+        'body_bytes_sent=$body_bytes_sent '
+        'server_protocol="$server_protocol" '
+        'status=$status '
+        'http_referrer="$http_referer" '
+        'http_x_forwarded_for="$http_x_forwarded_for" '
+        'http_user_agent="$http_user_agent"';
+
+    access_log  /dev/stdout  ext_format;
 
     sendfile        on;
     gzip            on;