diff --git a/lang-pp/Cargo.toml b/lang-pp/Cargo.toml
index f664dc90f..41c5d45b2 100644
--- a/lang-pp/Cargo.toml
+++ b/lang-pp/Cargo.toml
@@ -19,7 +19,7 @@ lang-util = "=0.5.3"
 string_cache = "0.8"
 thiserror = "1.0"
 arrayvec = "0.7"
-derive_more = "0.99"
+derive_more = "1.0"
 
 # Preprocessor
 rowan = { version = "0.15", optional = true }
diff --git a/lang-util-dev/Cargo.toml b/lang-util-dev/Cargo.toml
index bc7678c04..0af2c50a2 100644
--- a/lang-util-dev/Cargo.toml
+++ b/lang-util-dev/Cargo.toml
@@ -13,5 +13,5 @@ keywords = ["language", "parser", "ast"]
 categories = ["parsing"]
 
 [dependencies]
-derive_more = "0.99"
+derive_more = "1.0"
 similar-asserts = "1.4"
diff --git a/lang-util/Cargo.toml b/lang-util/Cargo.toml
index 569a0a75f..bb782f97a 100644
--- a/lang-util/Cargo.toml
+++ b/lang-util/Cargo.toml
@@ -17,7 +17,7 @@ lang-util-derive = "=0.5.3"
 line-span = "0.1"
 smol_str = "0.1"
 text-size = "1.1"
-derive_more = "0.99"
+derive_more = "1.0"
 
 # lalrpop dependencies
 lalrpop-util = { version = "0.20.0", default-features = false, optional = true }