diff --git a/Cargo.lock b/Cargo.lock
index a902f32..cc70dd0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -547,9 +547,9 @@ dependencies = [
 
 [[package]]
 name = "petgraph"
-version = "0.6.2"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6d5014253a1331579ce62aa67443b4a658c5e7dd03d4bc6d302b94474888143"
+checksum = "4dd7d28ee937e54fe3080c91faa1c3a46c06de6252988a7f4592ba2310ef22a4"
 dependencies = [
  "fixedbitset",
  "indexmap",
diff --git a/Cargo.toml b/Cargo.toml
index fb4396f..a88af4f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ thiserror = "1.0"
 lazy_static = "1.4.0"
 
 [dependencies.petgraph]
-version = "0.6.2"
+version = "0.6.3"
 features =  [ "serde-1" ]
 
 [dependencies.chrono]