diff --git a/Cargo.lock b/Cargo.lock
index bf05941..64d7132 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1072,9 +1072,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.67"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d433d9f1a3e8c1263d9456598b16fec66f4acc9a74dacffd35c7bb09b3a1328"
+checksum = "5b1106fec09662ec6dd98ccac0f81cef56984d0b49f75c92d8cbad76e20c005c"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index d3e4122..e3152ae 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,7 +43,7 @@ ra_ap_vfs = "=0.0.177"
 serde_repr = "0.1.16"
 tap = "1.0.1"
 wyz = "0.6.1"
-proc-macro2 = "1.0.67"
+proc-macro2 = "1.0.68"
 pulldown-cmark = "0.9.3"
 getopts = "0.2.21"