diff --git a/Cargo.lock b/Cargo.lock
index 54eee4cb..1db6aad6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3428,7 +3428,7 @@ dependencies = [
  "num",
  "openssl",
  "petgraph",
- "proc-macro2 0.4.30",
+ "proc-macro2 1.0.95",
  "proc-mounts",
  "quote 0.6.13",
  "regex",
diff --git a/intel-sgx/sgxs-tools/Cargo.toml b/intel-sgx/sgxs-tools/Cargo.toml
index 495a0ab7..7f60a3e4 100644
--- a/intel-sgx/sgxs-tools/Cargo.toml
+++ b/intel-sgx/sgxs-tools/Cargo.toml
@@ -48,7 +48,7 @@ env_logger = "0.9"                               # MIT/Apache-2.0
 yansi = "0.5"                                    # MIT/Apache-2.0
 atty = "0.2"                                     # MIT
 quote = "0.6"                                    # MIT/Apache-2.0
-proc-macro2 = "0.4"                              # MIT/Apache-2.0
+proc-macro2 = "1.0"                              # MIT/Apache-2.0
 petgraph = "0.7"                                 # MIT/Apache-2.0
 mopa = "0.2"                                     # MIT/Apache-2.0
 syn = { version = "0.15", features = ["full"] }  # MIT/Apache-2.0