diff --git a/proguard.flags b/proguard.flags
new file mode 100644
index 0000000..965f85d
--- /dev/null
+++ b/proguard.flags
@@ -0,0 +1,31 @@
+###############################################################################
+#
+# ANT Stack
+#
+# Copyright 2011 Dynastream Innovations
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+###############################################################################
+
+-keep class com.dsi.ant.server.IAntHal
+
+-keep class com.dsi.ant.core.JAntJava {
+    void nativeCb_AntRxMessage(byte[]);
+    void nativeCb_AntStateChange(int);
+}
+
+-assumenosideeffects class android.util.Log {
+    public static int v(...);
+    public static int d(...);
+}