diff --git a/data/db/install.sql b/data/db/install.sql
index 0390eab..895a03b 100644
--- a/data/db/install.sql
+++ b/data/db/install.sql
@@ -924,7 +924,7 @@ CREATE TABLE `tracking` (
 	`customer_id` INT(20) NOT NULL DEFAULT '0',
 	`date_add` DATETIME NOT NULL,
 	`event` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
-	`event_value` DOUBLE NULL DEFAULT NULL,
+	`event_value` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`area` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`platform` CHAR(20) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`version` CHAR(20) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
diff --git a/data/db/update_1_0_24.sql b/data/db/update_1_0_24.sql
index 50a5530..0599f0b 100644
--- a/data/db/update_1_0_24.sql
+++ b/data/db/update_1_0_24.sql
@@ -5,7 +5,7 @@ CREATE TABLE `tracking` (
 	`customer_id` INT(20) NOT NULL DEFAULT '0',
 	`date_add` DATETIME NOT NULL,
 	`event` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
-	`event_value` DOUBLE NULL DEFAULT NULL,
+	`event_value` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`area` CHAR(100) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`platform` CHAR(20) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
 	`version` CHAR(20) NULL DEFAULT NULL COLLATE 'utf8_hungarian_ci',
diff --git a/src/main/kotlin/com/aitrainer/api/model/Tracking.kt b/src/main/kotlin/com/aitrainer/api/model/Tracking.kt
index 9402e51..4366015 100644
--- a/src/main/kotlin/com/aitrainer/api/model/Tracking.kt
+++ b/src/main/kotlin/com/aitrainer/api/model/Tracking.kt
@@ -12,7 +12,7 @@ data class Tracking (
     @get: NonNull var customerId: Long = 0,
     @get: NonNull var dateAdd: String? = null,
     @get: NonNull var event: String = "",
-    var eventValue: Double? = null,
+    var eventValue: String? = null,
     var area: String = "",
     var platform: String = "",
     var version: String = ""
diff --git a/src/test/kotlin/com/aitrainer/api/test/TrackingTest.kt b/src/test/kotlin/com/aitrainer/api/test/TrackingTest.kt
index ce8358f..77d52ce 100644
--- a/src/test/kotlin/com/aitrainer/api/test/TrackingTest.kt
+++ b/src/test/kotlin/com/aitrainer/api/test/TrackingTest.kt
@@ -36,6 +36,7 @@ class TrackingTest {
             customerId = 90,
             dateAdd = "2021-02-04 23:42:00",
             event = "SalesPage",
+            eventValue = 12.0.toString(),
             platform = "iOS",
             version = "1.1.5"
         )
@@ -46,6 +47,7 @@ class TrackingTest {
         assertTrue(response.body is Tracking )
         val trackingResponse = response.body
         assertEquals(trackingResponse!!.event, "SalesPage")
+        assertEquals(trackingResponse.eventValue, "12.0")
         assertEquals(trackingResponse.version, "1.1.5")
         trackingRepository.delete(trackingResponse)
     }