diff --git a/Cargo.toml b/Cargo.toml
index eea02e6..9b55d8b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ codecov = { repository = "mgeisler/version-sync" }
 pulldown-cmark = { version = "0.4", default-features = false }
 semver-parser = "0.9"
 syn = { version = "0.15", features = ["full"] }
-proc-macro2 = { version = "0.4", features = ["span-locations"] }
+proc-macro2 = { version = "1.0", features = ["span-locations"] }
 toml = "0.5"
 url = "1.0"
 itertools = "0.8"