diff --git a/algs4/.gitignore b/algs4/.gitignore
index 7975420..0edb790 100644
--- a/algs4/.gitignore
+++ b/algs4/.gitignore
@@ -1,11 +1,11 @@
-algs4.jar
-bin/
-checkstyle-5.4/
-checkstyle.zip
-drjava.jar
-findbugs-1.3.9/
-findbugs.zip
-stdlib.jar
+/algs4.jar
+/bin/
+/checkstyle-5.5/
+/checkstyle.zip
+/drjava.jar
+/findbugs-2.0.1/
+/findbugs.zip
+/stdlib.jar
 /largeT.txt
 /largeW.txt
 /tinyT.txt
diff --git a/algs4/src/java/.gitignore b/algs4/src/java/.gitignore
index 312347d..7c8e5bb 100644
--- a/algs4/src/java/.gitignore
+++ b/algs4/src/java/.gitignore
@@ -35,6 +35,7 @@
 /DepthFirstPaths.java
 /DepthFirstSearch.java
 /Digraph.java
+/DigraphGenerator.java
 /DijkstraAllPairsSP.java
 /DijkstraSP.java
 /DirectedCycle.java