diff --git a/defaults/main.yml b/defaults/main.yml
index 481196d..bbae907 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -44,4 +44,6 @@ prometheus_config_flags:
   'alertmanager.url': '{{ prometheus_alertmanager_url }}'
 
 prometheus_config_flags_extra: {}
+prometheus_pam_domain: "prometheus"
+prometheus_pam_nofile_value: "1024"
 
diff --git a/tasks/main.yml b/tasks/main.yml
index 4d76447..c12bfe3 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -106,6 +106,19 @@
   notify:
     - restart prometheus
 
+- name: change pam nofile limits for prometheus
+  pam_limits:
+    domain: "{{ prometheus_pam_domain }}"
+    limit_item: nofile
+    limit_type: "{{ item }}"
+    value: "{{ prometheus_pam_nofile_value }}"
+    use_max: yes
+  with_items:
+      - soft
+      - hard
+  notify:
+    - restart prometheus
+
 - name: ensure prometheus service is enabled
   service:
     name: prometheus