diff --git a/build.gradle.kts b/build.gradle.kts
index c5279d865..6ead66e55 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
-    val kotlinVersion = "1.9.22"
-    id("com.android.application") version "8.4.0" apply (false)
+    val kotlinVersion = "2.1.10"
+    id("com.android.application") version "8.8.0" apply (false)
     id("org.jetbrains.kotlin.android") version kotlinVersion apply (false)
     id("org.jetbrains.kotlin.kapt") version kotlinVersion apply (false)
     id("org.jetbrains.kotlin.multiplatform") version kotlinVersion apply (false)
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 17655d0ef..1e2fbf0d4 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/uhabits-android/build.gradle.kts b/uhabits-android/build.gradle.kts
index 289f0fe43..118c1b6bf 100644
--- a/uhabits-android/build.gradle.kts
+++ b/uhabits-android/build.gradle.kts
@@ -19,7 +19,7 @@
 
 plugins {
     id("com.github.triplet.play") version "3.8.6"
-    id("com.android.application") version "8.4.0"
+    id("com.android.application") version "8.8.0"
     id("org.jetbrains.kotlin.android")
     id("org.jetbrains.kotlin.kapt")
     id("org.jlleitschuh.gradle.ktlint")
diff --git a/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ColorPickerDialogFactory.kt b/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ColorPickerDialogFactory.kt
index e4cfa015b..700af3438 100644
--- a/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ColorPickerDialogFactory.kt
+++ b/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ColorPickerDialogFactory.kt
@@ -19,6 +19,7 @@
 package org.isoron.uhabits.activities.common.dialogs
 
 import android.content.Context
+import com.android.colorpicker.ColorPickerDialog.SIZE_SMALL
 import org.isoron.platform.gui.toInt
 import org.isoron.uhabits.R
 import org.isoron.uhabits.core.models.PaletteColor
@@ -39,7 +40,7 @@ class ColorPickerDialogFactory @Inject constructor(@param:ActivityContext privat
             res.getPalette(),
             androidColor,
             4,
-            com.android.colorpicker.ColorPickerDialog.SIZE_SMALL
+            SIZE_SMALL
         )
         return dialog
     }
diff --git a/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HeaderView.kt b/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HeaderView.kt
index c11c1bbba..30583ad4c 100644
--- a/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HeaderView.kt
+++ b/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HeaderView.kt
@@ -141,7 +141,7 @@ class HeaderView(
 
                 val y1 = rect.centerY() - 0.25 * em
                 val y2 = rect.centerY() + 1.25 * em
-                val lines = DateUtils.formatHeaderDate(day).toUpperCase().split("\n")
+                val lines = DateUtils.formatHeaderDate(day).uppercase().split("\n")
                 canvas.drawText(lines[0], rect.centerX(), y1.toFloat(), paint)
                 canvas.drawText(lines[1], rect.centerX(), y2.toFloat(), paint)
                 day.add(GregorianCalendar.DAY_OF_MONTH, -1)