diff --git a/build.gradle b/build.gradle
index 0a6e4c10a2..cbe84c5549 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,6 +29,7 @@ ext {
     wpilibVersion = "2023.4.2"
     opencvVersion = "4.6.0-4"
     joglVersion = "2.4.0-rc-20200307"
+    javalinVersion = "5.6.2"
     pubVersion = versionString
     isDev = pubVersion.startsWith("dev")
 
diff --git a/photon-core/build.gradle b/photon-core/build.gradle
index feaa5b0c74..dc805fff55 100644
--- a/photon-core/build.gradle
+++ b/photon-core/build.gradle
@@ -9,7 +9,7 @@ apply from: "${rootDir}/shared/common.gradle"
 dependencies {
     implementation project(':photon-targeting')
 
-    implementation 'io.javalin:javalin:4.2.0'
+    implementation "io.javalin:javalin:$javalinVersion"
 
     implementation 'org.msgpack:msgpack-core:0.9.0'
     implementation 'org.msgpack:jackson-dataformat-msgpack:0.9.0'
diff --git a/photon-server/build.gradle b/photon-server/build.gradle
index 6b1a5bf5ec..a37e4f3ea0 100644
--- a/photon-server/build.gradle
+++ b/photon-server/build.gradle
@@ -34,7 +34,7 @@ dependencies {
     implementation project(':photon-core')
     implementation project(':photon-targeting')
 
-    implementation "io.javalin:javalin:5.6.2"
+    implementation "io.javalin:javalin:$javalinVersion"
 
     implementation wpilibTools.deps.wpilibJava("wpiutil")
     implementation wpilibTools.deps.wpilibJava("wpimath")