diff --git a/proguard_openmap.txt b/proguard_openmap.txt
index 8bdc2105..9a767a45 100644
--- a/proguard_openmap.txt
+++ b/proguard_openmap.txt
@@ -178,3 +178,7 @@
 #-keep class  sun.misc.** {*;}
 #-keep class javax.lang.model.element.** {*;}
 #-keep class java.beans.** {*;}
+
+
+# https://github.com/osmdroid/osmdroid/issues/633 SDK version 26
+-dontwarn org.osmdroid.tileprovider.modules.NetworkAvailabliltyCheck
\ No newline at end of file
diff --git a/proguard_osm.txt b/proguard_osm.txt
index 2e3692cb..d641d59f 100644
--- a/proguard_osm.txt
+++ b/proguard_osm.txt
@@ -42,4 +42,7 @@
 
 -keep class microsoft.mappoint.** {*;}
 -keep class org.osmdroid.** {*;}
--keep class org.metalev.multitouch.controller.** {*;}
\ No newline at end of file
+-keep class org.metalev.multitouch.controller.** {*;}
+
+# https://github.com/osmdroid/osmdroid/issues/633 SDK version 26
+-dontwarn org.osmdroid.tileprovider.modules.NetworkAvailabliltyCheck
\ No newline at end of file