diff --git a/CHANGELOG.md b/CHANGELOG.md
index c9ee298ca8..1d96e5c82d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Fixes
 
+- Updated ProfileMeasurementValue types ([#2412](https://github.com/getsentry/sentry-java/pull/2412))
 - Clear window reference only on activity stop in profileMeasurements collector ([#2407](https://github.com/getsentry/sentry-java/pull/2407))
 - No longer disable OpenTelemetry exporters in default Java Agent config ([#2408](https://github.com/getsentry/sentry-java/pull/2408))
 - Fix `ClassNotFoundException` for `io.sentry.spring.SentrySpringServletContainerInitializer` in `sentry-spring-jakarta` ([#2411](https://github.com/getsentry/sentry-java/issues/2411))
diff --git a/sentry-android-core/src/main/java/io/sentry/android/core/AndroidTransactionProfiler.java b/sentry-android-core/src/main/java/io/sentry/android/core/AndroidTransactionProfiler.java
index 42897816f1..065c541db9 100644
--- a/sentry-android-core/src/main/java/io/sentry/android/core/AndroidTransactionProfiler.java
+++ b/sentry-android-core/src/main/java/io/sentry/android/core/AndroidTransactionProfiler.java
@@ -198,6 +198,12 @@ public void onFrameMetricCollected(
                   @NotNull FrameMetrics frameMetrics, float refreshRate) {
                 long frameTimestampRelativeNanos =
                     SystemClock.elapsedRealtimeNanos() - transactionStartNanos;
+
+                // We don't allow negative relative timestamps.
+                // So we add a check, even if this should never happen.
+                if (frameTimestampRelativeNanos < 0) {
+                  return;
+                }
                 long durationNanos = frameMetrics.getMetric(FrameMetrics.TOTAL_DURATION);
                 // Most frames take just a few nanoseconds longer than the optimal calculated
                 // duration.
diff --git a/sentry/src/main/java/io/sentry/profilemeasurements/ProfileMeasurementValue.java b/sentry/src/main/java/io/sentry/profilemeasurements/ProfileMeasurementValue.java
index 22d48b4a38..79f7a4306a 100644
--- a/sentry/src/main/java/io/sentry/profilemeasurements/ProfileMeasurementValue.java
+++ b/sentry/src/main/java/io/sentry/profilemeasurements/ProfileMeasurementValue.java
@@ -19,16 +19,16 @@
 public final class ProfileMeasurementValue implements JsonUnknown, JsonSerializable {
 
   private @Nullable Map<String, Object> unknown;
-  private @NotNull Long relativeStartNs; // timestamp in nanoseconds this frame was started
-  private @NotNull String value; // frame duration in nanoseconds
+  private @NotNull String relativeStartNs; // timestamp in nanoseconds this frame was started
+  private double value; // frame duration in nanoseconds
 
   public ProfileMeasurementValue() {
     this(0L, 0);
   }
 
   public ProfileMeasurementValue(final @NotNull Long relativeStartNs, final @NotNull Number value) {
-    this.relativeStartNs = relativeStartNs;
-    this.value = value.toString();
+    this.relativeStartNs = relativeStartNs.toString();
+    this.value = value.doubleValue();
   }
 
   @Override
@@ -38,7 +38,7 @@ public boolean equals(Object o) {
     ProfileMeasurementValue that = (ProfileMeasurementValue) o;
     return Objects.equals(unknown, that.unknown)
         && relativeStartNs.equals(that.relativeStartNs)
-        && value.equals(that.value);
+        && value == that.value;
   }
 
   @Override
@@ -93,13 +93,13 @@ public static final class Deserializer implements JsonDeserializer<ProfileMeasur
         final String nextName = reader.nextName();
         switch (nextName) {
           case JsonKeys.VALUE:
-            String value = reader.nextStringOrNull();
+            Double value = reader.nextDoubleOrNull();
             if (value != null) {
               data.value = value;
             }
             break;
           case JsonKeys.START_NS:
-            Long startNs = reader.nextLongOrNull();
+            String startNs = reader.nextStringOrNull();
             if (startNs != null) {
               data.relativeStartNs = startNs;
             }
diff --git a/sentry/src/test/java/io/sentry/JsonSerializerTest.kt b/sentry/src/test/java/io/sentry/JsonSerializerTest.kt
index f86e357c69..944fb24f73 100644
--- a/sentry/src/test/java/io/sentry/JsonSerializerTest.kt
+++ b/sentry/src/test/java/io/sentry/JsonSerializerTest.kt
@@ -520,7 +520,7 @@ class JsonSerializerTest {
                 ProfileMeasurement.ID_SCREEN_FRAME_RATES to
                     ProfileMeasurement(
                         ProfileMeasurement.UNIT_HZ,
-                        listOf(ProfileMeasurementValue(1, 60.1F))
+                        listOf(ProfileMeasurementValue(1, 60.1))
                     )
             )
         )
@@ -574,8 +574,8 @@ class JsonSerializerTest {
                         "unit" to ProfileMeasurement.UNIT_HZ,
                         "values" to listOf(
                             mapOf(
-                                "value" to "60.1",
-                                "elapsed_since_start_ns" to 1
+                                "value" to 60.1,
+                                "elapsed_since_start_ns" to "1"
                             )
                         )
                     )
@@ -710,7 +710,7 @@ class JsonSerializerTest {
         val measurementValues = listOf(ProfileMeasurementValue(1, 2), ProfileMeasurementValue(3, 4))
         val profileMeasurement = ProfileMeasurement(ProfileMeasurement.UNIT_NANOSECONDS, measurementValues)
         val actual = serializeToString(profileMeasurement)
-        val expected = "{\"unit\":\"nanosecond\",\"values\":[{\"value\":\"2\",\"elapsed_since_start_ns\":1},{\"value\":\"4\",\"elapsed_since_start_ns\":3}]}"
+        val expected = "{\"unit\":\"nanosecond\",\"values\":[{\"value\":2.0,\"elapsed_since_start_ns\":\"1\"},{\"value\":4.0,\"elapsed_since_start_ns\":\"3\"}]}"
         assertEquals(expected, actual)
     }
 
@@ -734,7 +734,7 @@ class JsonSerializerTest {
     fun `serializes profileMeasurementValue`() {
         val profileMeasurementValue = ProfileMeasurementValue(1, 2)
         val actual = serializeToString(profileMeasurementValue)
-        val expected = "{\"value\":\"2\",\"elapsed_since_start_ns\":1}"
+        val expected = "{\"value\":2.0,\"elapsed_since_start_ns\":\"1\"}"
         assertEquals(expected, actual)
     }