diff --git a/bottomsheetpickers/build.gradle b/bottomsheetpickers/build.gradle
index 0c4bfc9..b759d2f 100644
--- a/bottomsheetpickers/build.gradle
+++ b/bottomsheetpickers/build.gradle
@@ -34,6 +34,11 @@ android {
         versionCode rootProject.ext.versionCode
         versionName rootProject.ext.versionName
         vectorDrawables.useSupportLibrary = true
+        // TODO: If we ever remove the duplicate number pad classes in this library and instead
+        // import our NumberPadTimePicker library, we can safely remove this line. The remaining
+        // classes in this library have no issue building with Proguard for release build type,
+        // so we don't have any exclusion rules to add.
+        consumerProguardFiles 'proguard-rules.pro'
     }
 }
 
diff --git a/bottomsheetpickers/proguard-rules.pro b/bottomsheetpickers/proguard-rules.pro
index 6e37b71..820d3dc 100644
--- a/bottomsheetpickers/proguard-rules.pro
+++ b/bottomsheetpickers/proguard-rules.pro
@@ -15,3 +15,7 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+# TODO: If we ever remove the duplicate number pad classes in this library and instead
+# import our NumberPadTimePicker library, we can safely remove this line.
+-dontwarn com.philliphsu.bottomsheetpickers.time.numberpad.**
\ No newline at end of file
diff --git a/sample/build.gradle b/sample/build.gradle
index eea8545..6bc93b6 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -14,7 +14,8 @@ android {
     }
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }