diff --git a/build.gradle b/build.gradle
index 34cad3029..bb0b84ed2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,14 +27,14 @@ plugins {
     id "org.kordamp.gradle.markdown" version "2.2.0" // markdownToHtml        
     id "com.github.spotbugs" version "5.0.5"
     id "de.aaschmid.cpd" version "3.3"
-    id "edu.sc.seis.launch4j" version "2.5.1"
-    id "com.gorylenko.gradle-git-properties" version "2.3.2"
+    id "edu.sc.seis.launch4j" version "2.5.2"
+    id "com.gorylenko.gradle-git-properties" version "2.4.0"
     id "com.github.ben-manes.versions" version "0.42.0" // adds dependencyUpdates task
-    id "de.undercouch.download" version "4.1.2" // file download
+    id "de.undercouch.download" version "5.0.2" // file download
     id "checkstyle"
         
     // Checker Framework pluggable type-checking
-    id "org.checkerframework" version "0.6.7"
+    id "org.checkerframework" version "0.6.9"
     
     // code coverage
     id "jacoco"
@@ -127,14 +127,14 @@ integrationTest {
 }
 
 ext {
-    jackson_version = "2.13.1"
-    slf4j_version = "1.7.33"
-    tomcat_version = "10.0.16"
-    poi_version = "5.2.0"
+    jackson_version = "2.13.2"
+    slf4j_version = "1.7.36"
+    tomcat_version = "10.0.17"
+    poi_version = "5.2.1"
     junit_version = "5.8.2"
-    log4j_version = "2.17.1"
-    spotbugs_version = "4.5.3"
-    checker_framework_version = "3.21.1"
+    log4j_version = "2.17.2"
+    spotbugs_version = "4.6.0"
+    checker_framework_version = "3.21.3"
 
     web_build_dir = new File(project.buildDir, "web")
     documentation_build_dir = new File(project.buildDir, "gen-documentation")    
@@ -218,7 +218,7 @@ dependencies {
             
   implementation(group: "dnsjava", name: "dnsjava", version: "3.4.3")
        
-  implementation(group: "org.apache.tika", name: "tika-core", version: "2.2.1")
+  implementation(group: "org.apache.tika", name: "tika-core", version: "2.3.0")
     
   implementation(group: "com.diffplug.durian", name: "durian-core", version: "1.2.0")
         
@@ -228,11 +228,11 @@ dependencies {
     
   implementation(group: "net.java.linoleum", name: "jlfgr", version: "1_0")
         
-  implementation(group: "com.opencsv", name: "opencsv", version: "5.5.2")
+  implementation(group: "com.opencsv", name: "opencsv", version: "5.6")
     
   implementation(group: "net.mtu.eggplant", name: "JonsInfra", version: "3.2.0"   )
     
-  implementation(group: "com.google.guava", name: "guava", version: "31.0.1-jre")
+  implementation(group: "com.google.guava", name: "guava", version: "31.1-jre")
     
   implementation(group: "org.apache.xmlgraphics", name: "fop", version: "2.7") {
     // only needed for BMP and TIFF formats
@@ -264,13 +264,13 @@ dependencies {
   integrationTestImplementation(sourceSets.test.output)
         
   integrationTestImplementation(group: "org.easytesting", name: "fest-swing", version: "1.2.1")
-  integrationTestImplementation(group: "net.sourceforge.htmlunit", name: "htmlunit", version: "2.58.0") {
+  integrationTestImplementation(group: "net.sourceforge.htmlunit", name: "htmlunit", version: "2.59.0") {
       
     // xml APIs are part of the JDK
     exclude(group: "xml-apis", module: "xml-apis")
   }
   integrationTestImplementation(group: "org.seleniumhq.selenium", name: "selenium-server", version: "3.141.59")
-  integrationTestImplementation(group: "io.github.bonigarcia", name: "webdrivermanager", version: "5.0.3")
+  integrationTestImplementation(group: "io.github.bonigarcia", name: "webdrivermanager", version: "5.1.0")
   
   // make selenium log to log4j
   integrationTestImplementation(group: "org.apache.logging.log4j", name: "log4j-jul", version: project.log4j_version)
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 2e6e5897b..00e33edef 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists