diff --git a/markwon-image-loader/src/main/java/ru/noties/markwon/il/AsyncDrawableLoader.java b/markwon-image-loader/src/main/java/ru/noties/markwon/il/AsyncDrawableLoader.java
index e2d0eec0..0009c855 100644
--- a/markwon-image-loader/src/main/java/ru/noties/markwon/il/AsyncDrawableLoader.java
+++ b/markwon-image-loader/src/main/java/ru/noties/markwon/il/AsyncDrawableLoader.java
@@ -225,8 +225,18 @@ public class AsyncDrawableLoader implements AsyncDrawable.Loader {
          * @since 2.0.0
          */
         @NonNull
-        public Builder schemeHandler(@NonNull String scheme, @Nullable SchemeHandler schemeHandler) {
-            schemeHandlers.put(scheme, schemeHandler);
+        public Builder addSchemeHandler(@NonNull SchemeHandler schemeHandler) {
+
+            SchemeHandler previous;
+
+            for (String scheme : schemeHandler.schemes()) {
+                previous = schemeHandlers.put(scheme, schemeHandler);
+                if (previous != null) {
+                    throw new IllegalStateException(String.format("Multiple scheme handlers handle " +
+                            "the same scheme: `%s`, %s %s", scheme, previous, schemeHandler));
+                }
+            }
+
             return this;
         }
 
@@ -261,33 +271,13 @@ public class AsyncDrawableLoader implements AsyncDrawable.Loader {
 
             // @since 2.0.0
             // put default scheme handlers (to mimic previous behavior)
-            {
-
-                final boolean hasHttp = schemeHandlers.containsKey("http");
-                final boolean hasHttps = schemeHandlers.containsKey("https");
-
-                if (!hasHttp || !hasHttps) {
-
-                    if (client == null) {
-                        client = new OkHttpClient();
-                    }
-
-                    final NetworkSchemeHandler handler = NetworkSchemeHandler.create(client);
-                    if (!hasHttp) {
-                        schemeHandlers.put("http", handler);
-                    }
-                    if (!hasHttps) {
-                        schemeHandlers.put("https", handler);
-                    }
-                }
-
-                if (!schemeHandlers.containsKey("file")) {
-                    schemeHandlers.put("file", FileSchemeHandler.createWithAssets(resources.getAssets()));
-                }
-
-                if (!schemeHandlers.containsKey("data")) {
-                    schemeHandlers.put("data", DataUriSchemeHandler.create());
+            if (schemeHandlers.size() == 0) {
+                if (client == null) {
+                    client = new OkHttpClient();
                 }
+                addSchemeHandler(NetworkSchemeHandler.create(client));
+                addSchemeHandler(FileSchemeHandler.createWithAssets(resources.getAssets()));
+                addSchemeHandler(DataUriSchemeHandler.create());
             }
 
             // add default media decoders if not specified
diff --git a/markwon-image-loader/src/main/java/ru/noties/markwon/il/DataUriSchemeHandler.java b/markwon-image-loader/src/main/java/ru/noties/markwon/il/DataUriSchemeHandler.java
index 95bed1aa..e93aa256 100644
--- a/markwon-image-loader/src/main/java/ru/noties/markwon/il/DataUriSchemeHandler.java
+++ b/markwon-image-loader/src/main/java/ru/noties/markwon/il/DataUriSchemeHandler.java
@@ -6,6 +6,8 @@ import android.support.annotation.Nullable;
 import android.text.TextUtils;
 
 import java.io.ByteArrayInputStream;
+import java.util.Collection;
+import java.util.Collections;
 
 /**
  * @since 2.0.0
@@ -57,4 +59,10 @@ public class DataUriSchemeHandler extends SchemeHandler {
     public void cancel(@NonNull String raw) {
         // no op
     }
+
+    @NonNull
+    @Override
+    public Collection<String> schemes() {
+        return Collections.singleton("data");
+    }
 }
diff --git a/markwon-image-loader/src/main/java/ru/noties/markwon/il/FileSchemeHandler.java b/markwon-image-loader/src/main/java/ru/noties/markwon/il/FileSchemeHandler.java
index 51e96533..437bbf7a 100644
--- a/markwon-image-loader/src/main/java/ru/noties/markwon/il/FileSchemeHandler.java
+++ b/markwon-image-loader/src/main/java/ru/noties/markwon/il/FileSchemeHandler.java
@@ -11,6 +11,8 @@ import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -98,4 +100,10 @@ public class FileSchemeHandler extends SchemeHandler {
     public void cancel(@NonNull String raw) {
         // no op
     }
+
+    @NonNull
+    @Override
+    public Collection<String> schemes() {
+        return Collections.singleton("file");
+    }
 }
diff --git a/markwon-image-loader/src/main/java/ru/noties/markwon/il/NetworkSchemeHandler.java b/markwon-image-loader/src/main/java/ru/noties/markwon/il/NetworkSchemeHandler.java
index 8a98463a..d87c4019 100644
--- a/markwon-image-loader/src/main/java/ru/noties/markwon/il/NetworkSchemeHandler.java
+++ b/markwon-image-loader/src/main/java/ru/noties/markwon/il/NetworkSchemeHandler.java
@@ -6,6 +6,8 @@ import android.support.annotation.Nullable;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 
 import okhttp3.Call;
@@ -78,4 +80,10 @@ public class NetworkSchemeHandler extends SchemeHandler {
             }
         }
     }
+
+    @NonNull
+    @Override
+    public Collection<String> schemes() {
+        return Arrays.asList("http", "https");
+    }
 }
diff --git a/markwon-image-loader/src/main/java/ru/noties/markwon/il/SchemeHandler.java b/markwon-image-loader/src/main/java/ru/noties/markwon/il/SchemeHandler.java
index c83bc5d9..3a7f9fc7 100644
--- a/markwon-image-loader/src/main/java/ru/noties/markwon/il/SchemeHandler.java
+++ b/markwon-image-loader/src/main/java/ru/noties/markwon/il/SchemeHandler.java
@@ -4,6 +4,8 @@ import android.net.Uri;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
+import java.util.Collection;
+
 /**
  * @since 2.0.0
  */
@@ -13,4 +15,7 @@ public abstract class SchemeHandler {
     public abstract ImageItem handle(@NonNull String raw, @NonNull Uri uri);
 
     public abstract void cancel(@NonNull String raw);
+
+    @NonNull
+    public abstract Collection<String> schemes();
 }
diff --git a/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/JLatexMathMedia.java b/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/JLatexMathMedia.java
index 60fe52b9..bf0b76a5 100644
--- a/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/JLatexMathMedia.java
+++ b/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/JLatexMathMedia.java
@@ -4,11 +4,12 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.util.Log;
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.Scanner;
 
 import ru.noties.jlatexmath.JLatexMathDrawable;
@@ -36,13 +37,12 @@ public class JLatexMathMedia {
         }
     }
 
-    public static final String SCHEME = "jlatexmath";
-
     @NonNull
     public static String makeDestination(@NonNull String latex) {
         return SCHEME + "://" + latex;
     }
 
+    private static final String SCHEME = "jlatexmath";
     private static final String CONTENT_TYPE = "text/jlatexmath";
 
     private final Config config;
@@ -67,8 +67,6 @@ public class JLatexMathMedia {
         @Override
         public ImageItem handle(@NonNull String raw, @NonNull Uri uri) {
 
-            Log.e("handle", raw);
-
             ImageItem item = null;
 
             try {
@@ -89,6 +87,12 @@ public class JLatexMathMedia {
         public void cancel(@NonNull String raw) {
             // no op
         }
+
+        @NonNull
+        @Override
+        public Collection<String> schemes() {
+            return Collections.singleton(SCHEME);
+        }
     }
 
     static class MediaDecoderImpl extends MediaDecoder {
@@ -118,15 +122,12 @@ public class JLatexMathMedia {
                     ? scanner.next()
                     : null;
 
-            Log.e("decode", latex);
-
             if (latex == null) {
                 return null;
             }
 
-            // todo: change to float
             return JLatexMathDrawable.builder(latex)
-                    .textSize((int) config.textSize)
+                    .textSize(config.textSize)
                     .background(config.background)
                     .align(config.align)
                     .fitCanvas(config.fitCanvas)
diff --git a/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/MainActivity.java b/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/MainActivity.java
index dcc1c8d5..5cb35c18 100644
--- a/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/MainActivity.java
+++ b/sample-latex-math/src/main/java/ru/noties/markwon/sample/jlatexmath/MainActivity.java
@@ -2,7 +2,6 @@ package ru.noties.markwon.sample.jlatexmath;
 
 import android.app.Activity;
 import android.os.Bundle;
-import android.util.Log;
 import android.widget.TextView;
 
 import org.commonmark.node.CustomBlock;
@@ -10,7 +9,6 @@ import org.commonmark.node.Node;
 import org.commonmark.parser.Parser;
 
 import ru.noties.jlatexmath.JLatexMathAndroid;
-import ru.noties.jlatexmath.JLatexMathDrawable;
 import ru.noties.markwon.Markwon;
 import ru.noties.markwon.SpannableBuilder;
 import ru.noties.markwon.SpannableConfiguration;
@@ -59,7 +57,7 @@ public class MainActivity extends Activity {
         final JLatexMathMedia jLatexMathMedia = new JLatexMathMedia(config);
 
         final AsyncDrawableLoader asyncDrawableLoader = AsyncDrawableLoader.builder()
-                .schemeHandler(JLatexMathMedia.SCHEME, jLatexMathMedia.schemeHandler())
+                .addSchemeHandler(jLatexMathMedia.schemeHandler())
                 .mediaDecoders(jLatexMathMedia.mediaDecoder())
                 .build();