diff --git a/build.gradle b/build.gradle
index 09dcae794a..4fd45217f8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -66,7 +66,7 @@ configurations {
 
 dependencies {
     antLibs("org.junit.jupiter:junit-jupiter:5.9.1")
-    antLibs("org.apache.ant:ant-junitlauncher:1.10.13")
+    antLibs("org.apache.ant:ant-junitlauncher:1.10.12")
 }
 
 ant.taskdef(name: "junit",
diff --git a/build.xml b/build.xml
index 99e5b59aff..6f2c00fb37 100644
--- a/build.xml
+++ b/build.xml
@@ -291,8 +291,8 @@ under the License.
     <dependency prefix="main.log4j-core" artifact="org.apache.logging.log4j:log4j-core:2.19.0" usage="main-tests"/>
     <dependency prefix="main.commons-logging" artifact="commons-logging:commons-logging:1.2" usage="main-tests"/>
 
-    <dependency prefix="main.ant" artifact="org.apache.ant:ant:1.10.13" usage="excelant"/>
-    <dependency prefix="main.antlauncher" artifact="org.apache.ant:ant-launcher:1.10.13" usage="excelant"/>
+    <dependency prefix="main.ant" artifact="org.apache.ant:ant:1.10.12" usage="excelant"/>
+    <dependency prefix="main.antlauncher" artifact="org.apache.ant:ant-launcher:1.10.12" usage="excelant"/>
 
     <!-- xml signature libs - not part of the distribution -->
     <dependency prefix="dsig.xmlsec" artifact="org.apache.santuario:xmlsec:3.0.1" usage="ooxml-provided"/>
diff --git a/poi-excelant/build.gradle b/poi-excelant/build.gradle
index 0bf47c0fe7..0c0bb935d4 100644
--- a/poi-excelant/build.gradle
+++ b/poi-excelant/build.gradle
@@ -31,7 +31,7 @@ sourceSets {
 }
 
 dependencies {
-    api 'org.apache.ant:ant:1.10.13'
+    api 'org.apache.ant:ant:1.10.12'
 
     api project(':poi-ooxml')
     compileOnly project(path: ':poi-ooxml', configuration: 'archives')
diff --git a/poi/build.gradle b/poi/build.gradle
index 59d75e87bc..c2f60e24a0 100644
--- a/poi/build.gradle
+++ b/poi/build.gradle
@@ -44,7 +44,7 @@ dependencies {
     api "org.apache.logging.log4j:log4j-api:${log4jVersion}"
 
     testImplementation 'org.reflections:reflections:0.10.2'
-    testImplementation 'org.apache.ant:ant:1.10.13'
+    testImplementation 'org.apache.ant:ant:1.10.12'
 
     testImplementation "org.junit.jupiter:junit-jupiter-api:${junitVersion}"
     testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${junitVersion}"