diff --git a/Cargo.lock b/Cargo.lock
index 3c94359..5176b07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -740,9 +740,9 @@ dependencies = [
 
 [[package]]
 name = "petgraph"
-version = "0.6.4"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e1d3afd2628e69da2be385eb6f2fd57c8ac7977ceeff6dc166ff1657b0e386a9"
+checksum = "b4c5cc86750666a3ed20bdaf5ca2a0344f9c67674cae0515bec2da16fbaa47db"
 dependencies = [
  "fixedbitset",
  "indexmap",
diff --git a/Cargo.toml b/Cargo.toml
index c555ed3..e214999 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ crate-type = ["cdylib", "rlib"]
 itertools = "0.12.1"
 lazy_static = "1.4.0"
 ndarray = "0.15.6"
-petgraph = {version = "0.6.4", default-features = false, features = ["stable_graph"]}
+petgraph = {version = "0.6.5", default-features = false, features = ["stable_graph"]}
 regex = "1.10.4"
 unic-char-range = "0.9.0"
 unic-ucd-category = "0.9.0"