diff --git a/background/pom.xml b/background/pom.xml
index cda375cf7..44f2870a9 100644
--- a/background/pom.xml
+++ b/background/pom.xml
@@ -71,7 +71,7 @@ Copyright 2019 Google LLC
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/bookshelf-standard/2-structured-data/pom.xml b/bookshelf-standard/2-structured-data/pom.xml
index bc0ad32d4..efdc0ed46 100644
--- a/bookshelf-standard/2-structured-data/pom.xml
+++ b/bookshelf-standard/2-structured-data/pom.xml
@@ -109,7 +109,7 @@ Copyright 2016 Google Inc.
     <dependency>                        <!-- Google Core Libraries for Java -->
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>  <!-- https://github.com/google/guava/wiki -->
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/bookshelf-standard/3-binary-data/pom.xml b/bookshelf-standard/3-binary-data/pom.xml
index 042127bd0..22d8924ee 100644
--- a/bookshelf-standard/3-binary-data/pom.xml
+++ b/bookshelf-standard/3-binary-data/pom.xml
@@ -117,7 +117,7 @@ Copyright 2016 Google Inc.
     <dependency>                        <!-- Google Core Libraries for Java -->
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>  <!-- https://github.com/google/guava/wiki -->
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/bookshelf-standard/4-auth/pom.xml b/bookshelf-standard/4-auth/pom.xml
index cf1e1d1da..655ebb05a 100644
--- a/bookshelf-standard/4-auth/pom.xml
+++ b/bookshelf-standard/4-auth/pom.xml
@@ -118,7 +118,7 @@ Copyright 2016 Google Inc.
     <dependency>                        <!-- Google Core Libraries for Java -->
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>  <!-- https://github.com/google/guava/wiki -->
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/bookshelf-standard/5-logging/pom.xml b/bookshelf-standard/5-logging/pom.xml
index b18762c12..011fc6bb1 100644
--- a/bookshelf-standard/5-logging/pom.xml
+++ b/bookshelf-standard/5-logging/pom.xml
@@ -118,7 +118,7 @@ Copyright 2016 Google Inc.
     <dependency>                        <!-- Google Core Libraries for Java -->
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>  <!-- https://github.com/google/guava/wiki -->
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/bookshelf/1-cloud-run/pom.xml b/bookshelf/1-cloud-run/pom.xml
index efcf31a74..c61139104 100644
--- a/bookshelf/1-cloud-run/pom.xml
+++ b/bookshelf/1-cloud-run/pom.xml
@@ -67,7 +67,7 @@ Copyright 2019 Google LLC
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>compile</scope>
     </dependency>
 
diff --git a/gce/pom.xml b/gce/pom.xml
index 2458faeff..3c82f67f9 100644
--- a/gce/pom.xml
+++ b/gce/pom.xml
@@ -75,7 +75,7 @@ Copyright 2019 Google LLC
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>33.1.0-jre</version>
+      <version>33.7.2-jre</version>
       <scope>test</scope>
     </dependency>
     <dependency>