diff --git a/.gitignore b/.gitignore
index ba830fc..7751635 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 *~
 chain.dat
+flamegraph.svg
diff --git a/Cargo.lock b/Cargo.lock
index 928fb90..19caf01 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -605,7 +605,7 @@ dependencies = [
 
 [[package]]
 name = "markov"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "cfg-if 1.0.0",
  "futures",