diff --git a/filesystem/archivetool/build.gradle b/filesystem/archivetool/build.gradle
index ef4a1553..8db329b7 100644
--- a/filesystem/archivetool/build.gradle
+++ b/filesystem/archivetool/build.gradle
@@ -17,7 +17,7 @@ dependencies {
     implementation project(":mysql")
     compileOnly "com.google.code.findbugs:jsr305:1.3.9"
     runtimeOnly "mysql:mysql-connector-java:$mysqlJdbcVersion"
-    runtimeOnly "org.slf4j:slf4j-simple:1.7.25"
+    runtimeOnly "org.slf4j:slf4j-simple:1.7.31"
 }
 
 tasks.withType(JavaCompile).configureEach {
diff --git a/mysql-legacy/build.gradle b/mysql-legacy/build.gradle
index c295a861..d1443b39 100644
--- a/mysql-legacy/build.gradle
+++ b/mysql-legacy/build.gradle
@@ -47,7 +47,7 @@ dependencies {
     testCompileOnly "org.joda:joda-convert:1.3.1"
     testRuntimeOnly "org.pegdown:pegdown:1.4.2"
     testImplementation "mysql:mysql-connector-java:$mysqlJdbcVersion"
-    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.25"
+    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.31"
 }
 
 check.dependsOn("scalatest")
diff --git a/mysql/build.gradle b/mysql/build.gradle
index 1c0aec65..b9b5d85f 100644
--- a/mysql/build.gradle
+++ b/mysql/build.gradle
@@ -36,7 +36,7 @@ dependencies {
     testImplementation "com.timgroup:clocks-testing:1.0.1111" // autobump
     testImplementation "mysql:mysql-connector-java:$mysqlJdbcVersion"
     testCompileOnly "com.google.code.findbugs:jsr305:1.3.9"
-    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.25"
+    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.31"
 }
 
 tasks.withType(JavaCompile).configureEach {
diff --git a/subscription/build.gradle b/subscription/build.gradle
index a70e3cde..51daed9e 100644
--- a/subscription/build.gradle
+++ b/subscription/build.gradle
@@ -39,7 +39,7 @@ dependencies {
     testImplementation "org.mockito:mockito-core:3.7.7"
     testImplementation "com.youdevise:Matchers:0.0.1293" // autobump
     testImplementation "net.ttsui.junit.rules.pending:pending:0.0.1055"
-    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.25"
+    testRuntimeOnly "org.slf4j:slf4j-simple:1.7.31"
 }
 
 tasks.withType(JavaCompile).configureEach {