diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6dd4e2c..a45c78a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.4.1 - 7 March 2022
+
+- \#287 Upgrade POI to 5.2.1
+
 ## 3.4.0 - 4 March 2022
 
 - Enhancements
@@ -7,7 +11,7 @@
 	- \#283 Mismatched system/Lucee timezones causes read() to offset date values
 	- \#285 read() should use the first visible sheet in the workbook if no sheet is specified, ignoring hidden sheets
 
-## 3.3.0
+## 3.3.0 - 15 January 2022
 
 - \#282 Upgrade POI to 5.2.0
 
diff --git a/ModuleConfig.cfc b/ModuleConfig.cfc
index 4c03f9c..c3b03a3 100644
--- a/ModuleConfig.cfc
+++ b/ModuleConfig.cfc
@@ -4,7 +4,7 @@ component{
     this.author = "Julian Halliwell";
     this.webURL = "https://github.com/cfsimplicity/spreadsheet-cfml";
     this.description = "CFML Spreadsheet Library";
-    this.version = "3.4.0";
+    this.version = "3.4.1";
     this.autoMapModels = false;
 
     function configure(){
diff --git a/Spreadsheet.cfc b/Spreadsheet.cfc
index e19c5d6..3c5e6f4 100644
--- a/Spreadsheet.cfc
+++ b/Spreadsheet.cfc
@@ -1,8 +1,8 @@
 component accessors="true"{
 
 	//"static"
-	property name="version" default="3.4.0" setter="false";
-	property name="osgiLibBundleVersion" default="5.2.0.0" setter="false"; //first 3 octets = POI version; increment 4th with other jar updates
+	property name="version" default="3.4.1" setter="false";
+	property name="osgiLibBundleVersion" default="5.2.1.0" setter="false"; //first 3 octets = POI version; increment 4th with other jar updates
 	property name="osgiLibBundleSymbolicName" default="spreadsheet-cfml" setter="false";
 	property name="exceptionType" default="cfsimplicity.spreadsheet" setter="false";
 	//commonly invoked POI class names
diff --git a/box.json b/box.json
index 7670c63..4ddadb1 100644
--- a/box.json
+++ b/box.json
@@ -1,10 +1,10 @@
 {
     "name" : "Spreadsheet CFML",
     "slug" : "spreadsheet-cfml",
-    "version" : "3.4.0",
+    "version" : "3.4.1",
     "shortDescription" : "CFML spreadsheet library",
     "author" : "Julian Halliwell",
-    "location" : "https://github.com/cfsimplicity/spreadsheet-cfml/archive/v3.4.0.zip",
+    "location" : "https://github.com/cfsimplicity/spreadsheet-cfml/archive/v3.4.1.zip",
     "homepage" : "https://github.com/cfsimplicity/spreadsheet-cfml",
     "projectURL" : "https://github.com/cfsimplicity/spreadsheet-cfml",
     "documentation" : "https://github.com/cfsimplicity/spreadsheet-cfml/blob/main/README.md",
diff --git a/build/lib-osgi.mf b/build/lib-osgi.mf
index bbc4e7c..e6e2fb0 100644
--- a/build/lib-osgi.mf
+++ b/build/lib-osgi.mf
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: Spreadsheet CFML
 Bundle-SymbolicName: spreadsheet-cfml
-Bundle-Version: 5.2.0.0
+Bundle-Version: 5.2.1.0
 Bundle-ClassPath: commons-codec-1.15.jar,
  commons-collections4-4.4.jar,
  commons-compress-1.21.jar,
@@ -10,9 +10,9 @@ Bundle-ClassPath: commons-codec-1.15.jar,
  commons-io-2.11.0.jar,
  commons-math3-3.6.1.jar,
  log4j-api-2.17.1.jar,
- poi-5.2.0.jar,
- poi-ooxml-5.2.0.jar,
- poi-ooxml-full-5.2.0.jar,
+ poi-5.2.1.jar,
+ poi-ooxml-5.2.1.jar,
+ poi-ooxml-full-5.2.1.jar,
  SparseBitSet-1.2.jar,
  spreadsheet-cfml.jar,
  xmlbeans-5.0.3.jar
diff --git a/build/task.cfc b/build/task.cfc
index 6a51d6e..a2a6a17 100644
--- a/build/task.cfc
+++ b/build/task.cfc
@@ -18,7 +18,7 @@ component{
 		variables.libPath = variables.rootPath & "lib/";
 		variables.classpathDirectories = [
 			variables.srcPath
-			,variables.libPath & "poi-ooxml-5.2.0.jar"
+			,variables.libPath & "poi-ooxml-5.2.1.jar"
 			,variables.libPath & "xmlbeans-5.0.3.jar"
 		];
 		var jarFileName = "spreadsheet-cfml.jar";
diff --git a/lib-osgi.jar b/lib-osgi.jar
index 6c046e3..299ac52 100644
Binary files a/lib-osgi.jar and b/lib-osgi.jar differ
diff --git a/lib/poi-5.2.0.jar b/lib/poi-5.2.1.jar
similarity index 86%
rename from lib/poi-5.2.0.jar
rename to lib/poi-5.2.1.jar
index 58bbab0..9e068d3 100644
Binary files a/lib/poi-5.2.0.jar and b/lib/poi-5.2.1.jar differ
diff --git a/lib/poi-ooxml-5.2.0.jar b/lib/poi-ooxml-5.2.1.jar
similarity index 79%
rename from lib/poi-ooxml-5.2.0.jar
rename to lib/poi-ooxml-5.2.1.jar
index cafa08d..f6a9086 100644
Binary files a/lib/poi-ooxml-5.2.0.jar and b/lib/poi-ooxml-5.2.1.jar differ
diff --git a/lib/poi-ooxml-full-5.2.0.jar b/lib/poi-ooxml-full-5.2.1.jar
similarity index 87%
rename from lib/poi-ooxml-full-5.2.0.jar
rename to lib/poi-ooxml-full-5.2.1.jar
index 38929ba..67fa1f4 100644
Binary files a/lib/poi-ooxml-full-5.2.0.jar and b/lib/poi-ooxml-full-5.2.1.jar differ
diff --git a/lib/spreadsheet-cfml.jar b/lib/spreadsheet-cfml.jar
index 23d2bda..567f5b9 100644
Binary files a/lib/spreadsheet-cfml.jar and b/lib/spreadsheet-cfml.jar differ