diff --git a/build.gradle b/build.gradle
index 4a7d5ab..13ee53f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,7 +25,7 @@ ext.errorproneVersion = '2.26.1'
 
 dependencies {
   implementation 'org.plumelib:options:2.0.3'
-  implementation 'org.plumelib:plume-util:1.9.0'
+  implementation 'org.plumelib:plume-util:1.9.1'
 
   compileOnly "com.google.errorprone:error_prone_annotations:${errorproneVersion}"
 }
diff --git a/src/main/java/org/plumelib/lookup/Lookup.java b/src/main/java/org/plumelib/lookup/Lookup.java
index 4f5faec..be73070 100644
--- a/src/main/java/org/plumelib/lookup/Lookup.java
+++ b/src/main/java/org/plumelib/lookup/Lookup.java
@@ -12,8 +12,8 @@
 import org.plumelib.options.OptionGroup;
 import org.plumelib.options.Options;
 import org.plumelib.util.EntryReader;
+import org.plumelib.util.FilesPlume;
 import org.plumelib.util.RegexUtil;
-import org.plumelib.util.UtilPlume;
 
 /**
  * Lookup searches a set of files, much like {@code grep} does. However, Lookup searches by entry
@@ -263,7 +263,7 @@ public static void main(String[] args) throws IOException {
       String[] entryFiles = entry_file.split(":");
       List<Exception> fileErrors = new ArrayList<>();
       for (String ef : entryFiles) {
-        ef = UtilPlume.expandFilename(ef);
+        ef = FilesPlume.expandFilename(ef);
         try {
           reader = new EntryReader(ef, comment_re, include_re);
         } catch (FileNotFoundException e) {