diff --git a/.ccls b/.ccls
index 28646fc..4b4ae65 100644
--- a/.ccls
+++ b/.ccls
@@ -3,3 +3,20 @@ gcc
 %h
 -Iinclude
 -D_GNU_SOURCE
+-Wall
+-Wextra
+-Wpedantic
+-Wstrict-aliasing
+-Wfloat-equal
+-Wundef
+-Wshadow
+-Wpointer-arith
+-Wcast-align
+-Wstrict-prototypes
+-Wstrict-overflow=5
+-Wwrite-strings
+-Wcast-qual
+-Wswitch-default
+-Wswitch-enum
+-Wconversion
+-Wunreachable-code