diff --git a/oeffi/src/de/schildbach/oeffi/OeffiMainActivity.java b/oeffi/src/de/schildbach/oeffi/OeffiMainActivity.java
index 5e19145..f7be833 100644
--- a/oeffi/src/de/schildbach/oeffi/OeffiMainActivity.java
+++ b/oeffi/src/de/schildbach/oeffi/OeffiMainActivity.java
@@ -395,6 +395,7 @@ public abstract class OeffiMainActivity extends OeffiActivity {
         remoteUrl.addPathSegment(remoteFileName.toString());
         remoteUrl.addEncodedQueryParameter("installer",
                 Strings.nullToEmpty(getPackageManager().getInstallerPackageName(getPackageName())));
+        remoteUrl.addQueryParameter("sdk", Integer.toString(Build.VERSION.SDK_INT));
         remoteUrl.addQueryParameter("task", taskName());
         final File localFile = new File(getFilesDir(), "messages.txt");
         final Downloader downloader = new Downloader(getCacheDir());
diff --git a/oeffi/src/de/schildbach/oeffi/util/ChangelogDialogBuilder.java b/oeffi/src/de/schildbach/oeffi/util/ChangelogDialogBuilder.java
index 2612728..31c3f98 100644
--- a/oeffi/src/de/schildbach/oeffi/util/ChangelogDialogBuilder.java
+++ b/oeffi/src/de/schildbach/oeffi/util/ChangelogDialogBuilder.java
@@ -25,6 +25,7 @@ import de.schildbach.oeffi.R;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
+import android.os.Build;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.webkit.WebChromeClient;
@@ -67,6 +68,7 @@ public class ChangelogDialogBuilder extends AlertDialog.Builder {
             url.addQueryParameter("lastVersion", Integer.toString(lastVersionCode));
         if (versionFlavor != null)
             url.addEncodedQueryParameter("flavor", versionFlavor);
+        url.addQueryParameter("sdk", Integer.toString(Build.VERSION.SDK_INT));
         if (task != null)
             url.addEncodedQueryParameter("task", task);
         webView.loadUrl(url.build().toString());
diff --git a/oeffi/src/de/schildbach/oeffi/util/ErrorReporter.java b/oeffi/src/de/schildbach/oeffi/util/ErrorReporter.java
index 3170cf9..bfbc32b 100644
--- a/oeffi/src/de/schildbach/oeffi/util/ErrorReporter.java
+++ b/oeffi/src/de/schildbach/oeffi/util/ErrorReporter.java
@@ -315,6 +315,7 @@ public class ErrorReporter implements Thread.UncaughtExceptionHandler {
         url.addQueryParameter("version", Integer.toString(applicationVersionCode));
         if (applicationVersionFlavor != null)
             url.addQueryParameter("flavor", applicationVersionFlavor);
+        url.addQueryParameter("sdk", Integer.toString(Build.VERSION.SDK_INT));
         url.addQueryParameter("check", null);
         final Request.Builder request = new Request.Builder().url(url.build());
         final Call call = Application.OKHTTP_CLIENT.newCall(request.build());