diff --git a/src/full/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java b/src/full/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
index 101462e5f..000444df1 100644
--- a/src/full/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
+++ b/src/full/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
@@ -118,11 +118,8 @@ public class UpdateRepos extends ParallelTask<Void, Void, Void> {
                         mm.repoDB.addRepo(repo);
                         publishProgress();
                     }
-                    if (!id.equals(repo.getId())) {
-                        Logger.error("Repo [" + name + "] rid=[" + id + "] id=[" + repo.getId() + "] mismatch");
-                    }
                 } catch (Repo.IllegalRepoException e) {
-                    Logger.error(e.getMessage());
+                    Logger.debug(e.getMessage());
                     mm.repoDB.removeRepo(id);
                 }
             });
@@ -205,7 +202,7 @@ public class UpdateRepos extends ParallelTask<Void, Void, Void> {
                             repo.update();
                             mm.repoDB.addRepo(repo);
                         } catch (Repo.IllegalRepoException e) {
-                            Logger.error(e.getMessage());
+                            Logger.debug(e.getMessage());
                             mm.repoDB.removeRepo(repo);
                         }
                     });
diff --git a/src/full/java/com/topjohnwu/magisk/container/Repo.java b/src/full/java/com/topjohnwu/magisk/container/Repo.java
index 41e41fa33..fc99fe790 100644
--- a/src/full/java/com/topjohnwu/magisk/container/Repo.java
+++ b/src/full/java/com/topjohnwu/magisk/container/Repo.java
@@ -44,7 +44,7 @@ public class Repo extends BaseModule {
             throw new IllegalRepoException("Repo [" + repoName + "] does not contain versionCode");
         }
         if (getMinMagiskVersion() < Const.MIN_MODULE_VER()) {
-            Logger.error("Repo [" + repoName + "] is outdated");
+            Logger.debug("Repo [" + repoName + "] is outdated");
         }
     }
 
diff --git a/src/full/java/com/topjohnwu/magisk/utils/Logger.java b/src/full/java/com/topjohnwu/magisk/utils/Logger.java
index 08d880c11..b3f05c111 100644
--- a/src/full/java/com/topjohnwu/magisk/utils/Logger.java
+++ b/src/full/java/com/topjohnwu/magisk/utils/Logger.java
@@ -2,18 +2,19 @@ package com.topjohnwu.magisk.utils;
 
 import android.util.Log;
 
+import com.topjohnwu.magisk.BuildConfig;
+
 import java.util.Locale;
 
 public class Logger {
 
-    private static final boolean SHELL_LOGGING = false;
-
     public static void debug(String line) {
-        Log.d(Const.DEBUG_TAG, "DEBUG: " + line);
+        if (BuildConfig.DEBUG)
+            Log.d(Const.DEBUG_TAG, "DEBUG: " + line);
     }
 
     public static void debug(String fmt, Object... args) {
-        debug(String.format(Locale.US, fmt, args));
+        debug(Utils.fmt(fmt, args));
     }
 
     public static void error(String line) {
@@ -21,16 +22,6 @@ public class Logger {
     }
 
     public static void error(String fmt, Object... args) {
-        error(String.format(Locale.US, fmt, args));
-    }
-
-    public static void shell(boolean in, String line) {
-        if (SHELL_LOGGING) {
-            Log.d(Const.DEBUG_TAG, (in ? "SHELLIN : " : "SHELLOUT: ") + line);
-        }
-    }
-
-    public static void shell(boolean in, String fmt, Object... args) {
-        shell(in, String.format(Locale.US, fmt, args));
+        error(Utils.fmt(fmt, args));
     }
 }