diff --git a/isabelle-core/build.gradle b/isabelle-core/build.gradle
index 752237a..c5f336f 100644
--- a/isabelle-core/build.gradle
+++ b/isabelle-core/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
 }
 
 shadowJar {
diff --git a/isabelle-spigot-governator-example/build.gradle b/isabelle-spigot-governator-example/build.gradle
index 7215d28..7a1b5ea 100644
--- a/isabelle-spigot-governator-example/build.gradle
+++ b/isabelle-spigot-governator-example/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
     id 'java'
 }
 
diff --git a/isabelle-spigot-governator/build.gradle b/isabelle-spigot-governator/build.gradle
index 29146de..ff0547a 100644
--- a/isabelle-spigot-governator/build.gradle
+++ b/isabelle-spigot-governator/build.gradle
@@ -1,6 +1,6 @@
 plugins {
 
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
     id 'java'
 }
 
diff --git a/isabelle-spigot-theresa/build.gradle b/isabelle-spigot-theresa/build.gradle
index 59eb7d1..2e350ed 100644
--- a/isabelle-spigot-theresa/build.gradle
+++ b/isabelle-spigot-theresa/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
 }
 
 shadowJar {
diff --git a/isabelle-spigot/build.gradle b/isabelle-spigot/build.gradle
index d1100f9..3a3b301 100644
--- a/isabelle-spigot/build.gradle
+++ b/isabelle-spigot/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.johnrengelman.shadow' version '8.1.0'
 }
 
 shadowJar {