diff --git a/src/pattern.rs b/src/pattern.rs
index 8778168..dedfd32 100644
--- a/src/pattern.rs
+++ b/src/pattern.rs
@@ -6,6 +6,7 @@ use wildmatch::WildMatch;
 
 /// Patterns that can be matched against files
 #[derive(Debug, Deserialize)]
+#[serde(rename_all = "snake_case")]
 pub enum Pattern {
     #[serde(deserialize_with = "deserialize_wildcard")]
     Wildcard(WildMatch),