diff --git a/api/pom.xml b/api/pom.xml
index dbff77a..bba59a1 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -40,7 +40,7 @@
 		<dependency>
 			<groupId>org.apache.poi</groupId>
 			<artifactId>poi</artifactId>
-			<version>3.17</version>
+			<version>4.1.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.poi</groupId>
diff --git a/omod/pom.xml b/omod/pom.xml
index db4e2b3..fec6696 100644
--- a/omod/pom.xml
+++ b/omod/pom.xml
@@ -38,7 +38,7 @@
 		<dependency>
 			<groupId>org.apache.poi</groupId>
 			<artifactId>poi</artifactId>
-			<version>3.17</version>
+			<version>4.1.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.poi</groupId>
diff --git a/pom.xml b/pom.xml
index ecff2bb..571e4f3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,7 +62,7 @@ lib/poi-ooxml-3.6-20091214.jar
 			<dependency>
 				<groupId>org.apache.poi</groupId>
 				<artifactId>poi</artifactId>
-				<version>3.17</version>
+				<version>4.1.1</version>
 			</dependency>
 			<dependency>
 				<groupId>org.apache.poi</groupId>