diff --git a/.ycm_extra_conf.py b/.ycm_extra_conf.py
new file mode 100644
index 0000000..c78ae1d
--- /dev/null
+++ b/.ycm_extra_conf.py
@@ -0,0 +1,11 @@
+def FlagsForFile(filename, **kwargs):
+    flags = [
+        '-Wall', '-Wextra', '-Werror',
+        '-std=c11',
+        '-x', 'c',
+    ]
+
+    return {
+        'flags': flags,
+        'do_cache': True
+    }