diff --git a/build.gradle b/build.gradle
index b72555cd..f8a20a53 100644
--- a/build.gradle
+++ b/build.gradle
@@ -129,7 +129,7 @@ subprojects {
                             exclude module: "groovy-all"
                         }
 
-                        runtimeOnly "net.bytebuddy:byte-buddy:1.18.10"  // Lets Spock mock classes (in addition to interfaces)
+                        runtimeOnly "net.bytebuddy:byte-buddy:1.18.11"  // Lets Spock mock classes (in addition to interfaces)
                         runtimeOnly "org.objenesis:objenesis:3.5"       // Lets Spock mock classes with constructor arguments
                     }
                 }
diff --git a/cj-btc-cli/build.gradle b/cj-btc-cli/build.gradle
index 4193abcc..cf4be02d 100644
--- a/cj-btc-cli/build.gradle
+++ b/cj-btc-cli/build.gradle
@@ -37,7 +37,7 @@ testing {
                     exclude module: "groovy-all"
                 }
 
-                runtimeOnly "net.bytebuddy:byte-buddy:1.18.10"
+                runtimeOnly "net.bytebuddy:byte-buddy:1.18.11"
                 // allows Spock to mock classes (in addition to interfaces)
                 runtimeOnly "org.objenesis:objenesis:3.5"
                 // Allow Spock to mock classes with constructor arguments
diff --git a/cj-btc-jsonrpc-integ-test/build.gradle b/cj-btc-jsonrpc-integ-test/build.gradle
index a8531aea..b3fc66d6 100644
--- a/cj-btc-jsonrpc-integ-test/build.gradle
+++ b/cj-btc-jsonrpc-integ-test/build.gradle
@@ -20,7 +20,7 @@ testing {
                     transitive = false
                 }
 
-                runtimeOnly "net.bytebuddy:byte-buddy:1.18.10"       // Allows Spock to mock classes (in addition to interfaces)
+                runtimeOnly "net.bytebuddy:byte-buddy:1.18.11"       // Allows Spock to mock classes (in addition to interfaces)
                 runtimeOnly "org.objenesis:objenesis:3.5"           // Allows Spock to mock classes with constructor arguments
                 runtimeOnly "org.slf4j:slf4j-jdk14:${slf4jVersion}" // Runtime implementation of slf4j
             }