diff --git a/core/pom.xml b/core/pom.xml
index e2144c2c9..0ea05ac8b 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -63,7 +63,7 @@
       <plugin>
         <groupId>biz.aQute.bnd</groupId>
         <artifactId>bnd-maven-plugin</artifactId>
-        <version>6.2.0</version>
+        <version>6.3.1</version>
         <executions>
           <execution>
             <goals>
diff --git a/core/src/main/java/com/google/zxing/common/BitMatrix.java b/core/src/main/java/com/google/zxing/common/BitMatrix.java
index aa00fd6e3..d3f21758c 100755
--- a/core/src/main/java/com/google/zxing/common/BitMatrix.java
+++ b/core/src/main/java/com/google/zxing/common/BitMatrix.java
@@ -287,7 +287,9 @@ public final class BitMatrix implements Cloneable {
   }
 
   /**
-   * Modifies this {@code BitMatrix} to represent the same but rotated the given degrees (multiple of 0, 90, 180, 270)
+   * Modifies this {@code BitMatrix} to represent the same but rotated the given degrees (0, 90, 180, 270)
+   *
+   * @param degrees number of degrees to rotate through counter-clockwise (0, 90, 180, 270)
    */
   public void rotate(int degrees) {
     switch (degrees % 360) {
diff --git a/core/src/main/java/com/google/zxing/common/ECIStringBuilder.java b/core/src/main/java/com/google/zxing/common/ECIStringBuilder.java
index ce251442a..a4a2968d1 100644
--- a/core/src/main/java/com/google/zxing/common/ECIStringBuilder.java
+++ b/core/src/main/java/com/google/zxing/common/ECIStringBuilder.java
@@ -78,6 +78,7 @@ public final class ECIStringBuilder {
    * Appends ECI value to output.
    *
    * @param value ECI value to append, as an int
+   * @throws FormatException on invalid ECI value
    */
   public void appendECI(int value) throws FormatException {
     encodeCurrentBytesIfAny();
diff --git a/pom.xml b/pom.xml
index 74d6496b7..d0a933e10 100644
--- a/pom.xml
+++ b/pom.xml
@@ -66,7 +66,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <java.version>1.8</java.version>
     <android.home>${env.ANDROID_HOME}</android.home>
-    <proguard.plugin.version>2.5.3</proguard.plugin.version>
+    <proguard.plugin.version>2.6.0</proguard.plugin.version>
     <!-- This can't reference project.version as some subprojects version differently -->
     <zxing.version>3.5.1-SNAPSHOT</zxing.version>
     <android.platform>22</android.platform>
@@ -113,7 +113,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-enforcer-plugin</artifactId>
-          <version>3.0.0</version>
+          <version>3.1.0</version>
           <executions>
             <execution>
               <id>enforce</id>
@@ -219,7 +219,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-assembly-plugin</artifactId>
-          <version>3.3.0</version>
+          <version>3.4.0</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
@@ -251,7 +251,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-release-plugin</artifactId>
-          <version>3.0.0-M5</version>
+          <version>3.0.0-M6</version>
           <configuration>
             <mavenExecutorId>forked-path</mavenExecutorId>
             <tagNameFormat>zxing-@{project.version}</tagNameFormat>
@@ -262,7 +262,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-scm-plugin</artifactId>
-          <version>1.12.2</version>
+          <version>2.0.0-M1</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
@@ -299,7 +299,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>3.0.0-M6</version>
+          <version>3.0.0-M7</version>
           <configuration>
             <forkCount>0.5C</forkCount>
             <systemPropertyVariables>
@@ -385,7 +385,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.12.0</version>
+          <version>4.0.0-M2</version>
           <inherited>false</inherited>
         </plugin>
         <plugin>
@@ -421,7 +421,7 @@
         <plugin>
           <groupId>org.apache.rat</groupId>
           <artifactId>apache-rat-plugin</artifactId>
-          <version>0.13</version>
+          <version>0.14</version>
           <configuration>
             <consoleOutput>true</consoleOutput>
             <ignoreErrors>true</ignoreErrors>
diff --git a/zxing.appspot.com/pom.xml b/zxing.appspot.com/pom.xml
index 00e7795df..15f00b23d 100644
--- a/zxing.appspot.com/pom.xml
+++ b/zxing.appspot.com/pom.xml
@@ -23,7 +23,7 @@
 
   <dependencies>
     <dependency>
-      <groupId>com.google.gwt</groupId>
+      <groupId>org.gwtproject</groupId>
       <artifactId>gwt-user</artifactId>
       <version>${gwt.version}</version>
       <scope>provided</scope>
@@ -37,7 +37,7 @@
   </parent>
 
   <properties>
-    <gwt.version>2.9.0</gwt.version>
+    <gwt.version>2.10.0</gwt.version>
   </properties>
 
   <build>
diff --git a/zxingorg/pom.xml b/zxingorg/pom.xml
index bef04ae6b..72cdf45ea 100644
--- a/zxingorg/pom.xml
+++ b/zxingorg/pom.xml
@@ -39,7 +39,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>31.0.1-android</version>
+      <version>31.1-android</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
@@ -73,7 +73,7 @@
   </parent>
 
   <properties>
-    <spring.version>5.3.19</spring.version>
+    <spring.version>5.3.21</spring.version>
   </properties>
 
   <build>