diff --git a/OptifinePlugin/src/main/java/fr/antoineok/flowupdater/optifineplugin/OptifinePlugin.java b/OptifinePlugin/src/main/java/fr/antoineok/flowupdater/optifineplugin/OptifinePlugin.java
index cc0c2c51..2ff8db6c 100644
--- a/OptifinePlugin/src/main/java/fr/antoineok/flowupdater/optifineplugin/OptifinePlugin.java
+++ b/OptifinePlugin/src/main/java/fr/antoineok/flowupdater/optifineplugin/OptifinePlugin.java
@@ -31,21 +31,18 @@ public void onStart() {
      * @return the object that defines the plugin
      * @throws IOException if the version is invalid or not found
      */
-    public Optifine getOptifine(String optifineVersion) throws IOException {
-
-        String name = "OptiFine_" + optifineVersion + ".jar";
-        if(optifineVersion.startsWith("preview"))
-            name = optifineVersion + ".jar";
-
-        HttpUrl.Builder urlBuilder = Objects.requireNonNull(HttpUrl.parse("http://optifine.net/downloadx")).newBuilder();
+    public Optifine getOptifine(String optifineVersion, boolean preview) throws IOException
+    {
+        final String name = preview ? optifineVersion + ".jar" : "OptiFine_" + optifineVersion + ".jar";
+        final HttpUrl.Builder urlBuilder = Objects.requireNonNull(HttpUrl.parse("http://optifine.net/downloadx")).newBuilder();
         urlBuilder.addQueryParameter("f", name);
-        urlBuilder.addQueryParameter("x", this.getJson(optifineVersion));
+        urlBuilder.addQueryParameter("x", preview ? this.getJsonPreview(optifineVersion) : this.getJson(optifineVersion));
 
-        String newUrl = urlBuilder.build().toString();
-        Request request = new Request.Builder()
+        final String newUrl = urlBuilder.build().toString();
+        final Request request = new Request.Builder()
                 .url(newUrl)
                 .build();
-        Response response = client.newCall(request).execute();
+        final Response response = client.newCall(request).execute();
         final int length = Integer.parseInt(Objects.requireNonNull(response.header("Content-Length")));
 
         assert response.body() != null;
@@ -55,7 +52,7 @@ public Optifine getOptifine(String optifineVersion) throws IOException {
             Files.copy(response.body().byteStream(), output.toPath(), StandardCopyOption.REPLACE_EXISTING);
         response.body().close();
 
-        if(length <= 25)
+        if(length <= 40)
             throw new IOException("Given version of Optifine not found.");
 
         return new Optifine(name, length);
@@ -108,6 +105,35 @@ private String getJson(String optifineVersion) {
         return "";
     }
 
+    private String getJsonPreview(String optifineVersion) {
+        Request request = new Request.Builder()
+                .url("http://optifine.net/adloadx?f=" + optifineVersion)
+                .build();
+        try
+        {
+            Response response = client.newCall(request).execute();
+            assert response.body() != null;
+            String resp = response.body().string();
+            String[] respLine = resp.split("\n");
+            response.body().close();
+            String keyLine = "";
+            for(String line : respLine) {
+                if(line.contains("downloadx?f=preview")) {
+                    keyLine = line;
+                    break;
+                }
+            }
+
+            return keyLine.replace("' onclick='onDownload()'>" + optifineVersion.replace("_", " ") +"</a>", "").replace("<a href='downloadx?f=" + optifineVersion + "&x=", "").replace(" ", "");
+        }
+        catch (IOException e)
+        {
+            this.getLogger().printStackTrace(e);
+        }
+
+        return "";
+    }
+
 
     @Override
     public void onStop() {
diff --git a/build.gradle b/build.gradle
index e4238f99..93b7c6dd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ allprojects {
     }
 }
 
-version '1.2.7'
+version '1.2.8'
 archivesBaseName = "flowupdater"
 
 artifacts {
diff --git a/src/main/java/fr/flowarg/flowupdater/FlowUpdater.java b/src/main/java/fr/flowarg/flowupdater/FlowUpdater.java
index 03b49df5..77af3a8b 100644
--- a/src/main/java/fr/flowarg/flowupdater/FlowUpdater.java
+++ b/src/main/java/fr/flowarg/flowupdater/FlowUpdater.java
@@ -94,7 +94,7 @@ private FlowUpdater(VanillaVersion version, ILogger logger, UpdaterOptions updat
     {
         this.logger = logger;
         this.version = version;
-       	this.logger.info(String.format("------------------------- FlowUpdater for Minecraft %s v%s -------------------------", this.version.getName(), "1.2.7"));
+       	this.logger.info(String.format("------------------------- FlowUpdater for Minecraft %s v%s -------------------------", this.version.getName(), "1.2.8"));
         this.externalFiles = externalFiles;
         this.postExecutions = postExecutions;
         this.forgeVersion = forgeVersion;
diff --git a/src/main/java/fr/flowarg/flowupdater/download/json/OptifineInfo.java b/src/main/java/fr/flowarg/flowupdater/download/json/OptifineInfo.java
new file mode 100644
index 00000000..e041ae79
--- /dev/null
+++ b/src/main/java/fr/flowarg/flowupdater/download/json/OptifineInfo.java
@@ -0,0 +1,23 @@
+package fr.flowarg.flowupdater.download.json;
+
+public class OptifineInfo
+{
+    private final String version;
+    private final boolean preview;
+
+    public OptifineInfo(String version, boolean preview)
+    {
+        this.version = version;
+        this.preview = preview;
+    }
+
+    public String getVersion()
+    {
+        return this.version;
+    }
+
+    public boolean isPreview()
+    {
+        return this.preview;
+    }
+}
diff --git a/src/main/java/fr/flowarg/flowupdater/utils/PluginManager.java b/src/main/java/fr/flowarg/flowupdater/utils/PluginManager.java
index 436c11f0..e55f77c4 100644
--- a/src/main/java/fr/flowarg/flowupdater/utils/PluginManager.java
+++ b/src/main/java/fr/flowarg/flowupdater/utils/PluginManager.java
@@ -166,7 +166,7 @@ public void loadOptifinePlugin(File dir, AbstractForgeVersion forgeVersion)
         try
         {
             final OptifinePlugin optifinePlugin = OptifinePlugin.instance;
-            final Optifine optifine = optifinePlugin.getOptifine(forgeVersion.getOptifine());
+            final Optifine optifine = optifinePlugin.getOptifine(forgeVersion.getOptifine().getVersion(), forgeVersion.getOptifine().isPreview());
             this.downloadInfos.setOptifine(optifine);
         } catch (Exception e)
         {
diff --git a/src/main/java/fr/flowarg/flowupdater/versions/AbstractForgeVersion.java b/src/main/java/fr/flowarg/flowupdater/versions/AbstractForgeVersion.java
index 271da883..3a678f33 100644
--- a/src/main/java/fr/flowarg/flowupdater/versions/AbstractForgeVersion.java
+++ b/src/main/java/fr/flowarg/flowupdater/versions/AbstractForgeVersion.java
@@ -11,6 +11,7 @@
 import fr.flowarg.flowupdater.download.json.CurseFileInfos;
 import fr.flowarg.flowupdater.download.json.CurseModPackInfos;
 import fr.flowarg.flowupdater.download.json.Mod;
+import fr.flowarg.flowupdater.download.json.OptifineInfo;
 import fr.flowarg.flowupdater.utils.IOUtils;
 import fr.flowarg.flowupdater.utils.ModFileDeleter;
 import fr.flowarg.flowupdater.utils.PluginManager;
@@ -37,7 +38,7 @@ public abstract class AbstractForgeVersion
     protected final IProgressCallback callback;
     protected final List<CurseFileInfos> curseMods;
     protected final ModFileDeleter fileDeleter;
-    protected final String optifine;
+    protected final OptifineInfo optifine;
     protected final CurseModPackInfos modPackInfos;
     protected List<Object> allCurseMods;
     protected URL installerUrl;
@@ -54,7 +55,7 @@ public abstract class AbstractForgeVersion
      * @param fileDeleter {@link ModFileDeleter} used to cleanup mods dir.
      * @param optifine Optifine version to install.
      */
-    protected AbstractForgeVersion(ILogger logger, List<Mod> mods, List<CurseFileInfos> curseMods, String forgeVersion, VanillaVersion vanilla, IProgressCallback callback, ModFileDeleter fileDeleter, String optifine, CurseModPackInfos modPackInfos)
+    protected AbstractForgeVersion(ILogger logger, List<Mod> mods, List<CurseFileInfos> curseMods, String forgeVersion, VanillaVersion vanilla, IProgressCallback callback, ModFileDeleter fileDeleter, OptifineInfo optifine, CurseModPackInfos modPackInfos)
     {
         this.logger = logger;
         this.mods = mods;
@@ -235,7 +236,7 @@ public List<CurseFileInfos> getCurseMods()
     {
         return this.curseMods;
     }
-    public String getOptifine()
+    public OptifineInfo getOptifine()
     {
         return this.optifine;
     }
diff --git a/src/main/java/fr/flowarg/flowupdater/versions/ForgeVersionBuilder.java b/src/main/java/fr/flowarg/flowupdater/versions/ForgeVersionBuilder.java
index 6eb0196b..e274df39 100644
--- a/src/main/java/fr/flowarg/flowupdater/versions/ForgeVersionBuilder.java
+++ b/src/main/java/fr/flowarg/flowupdater/versions/ForgeVersionBuilder.java
@@ -6,6 +6,7 @@
 import fr.flowarg.flowupdater.download.json.CurseFileInfos;
 import fr.flowarg.flowupdater.download.json.CurseModPackInfos;
 import fr.flowarg.flowupdater.download.json.Mod;
+import fr.flowarg.flowupdater.download.json.OptifineInfo;
 import fr.flowarg.flowupdater.utils.ModFileDeleter;
 import fr.flowarg.flowupdater.utils.builderapi.BuilderArgument;
 import fr.flowarg.flowupdater.utils.builderapi.BuilderException;
@@ -35,7 +36,7 @@ public ForgeVersionBuilder(ForgeVersionType type)
     private final BuilderArgument<List<CurseFileInfos>> curseModsArgument = new BuilderArgument<List<CurseFileInfos>>("CurseMods", ArrayList::new).optional();
     private final BuilderArgument<Boolean> nogGuiArgument = new BuilderArgument<>("NoGui", () -> true).optional();
     private final BuilderArgument<ModFileDeleter> fileDeleterArgument = new BuilderArgument<>("ModFileDeleter", () -> new ModFileDeleter(false)).optional();
-    private final BuilderArgument<String> optifineArgument = new BuilderArgument<String>("Optifine").optional();
+    private final BuilderArgument<OptifineInfo> optifineArgument = new BuilderArgument<OptifineInfo>("Optifine").optional();
     private final BuilderArgument<CurseModPackInfos> modPackArgument = new BuilderArgument<CurseModPackInfos>("ModPack").optional();
 
     public ForgeVersionBuilder withForgeVersion(String forgeVersion)
@@ -86,7 +87,7 @@ public ForgeVersionBuilder withFileDeleter(ModFileDeleter fileDeleter)
         return this;
     }
 
-    public ForgeVersionBuilder withOptifine(String optifine)
+    public ForgeVersionBuilder withOptifine(OptifineInfo optifine)
     {
         this.optifineArgument.set(optifine);
         return this;
diff --git a/src/main/java/fr/flowarg/flowupdater/versions/NewForgeVersion.java b/src/main/java/fr/flowarg/flowupdater/versions/NewForgeVersion.java
index b5379899..76a1fd26 100644
--- a/src/main/java/fr/flowarg/flowupdater/versions/NewForgeVersion.java
+++ b/src/main/java/fr/flowarg/flowupdater/versions/NewForgeVersion.java
@@ -6,6 +6,7 @@
 import fr.flowarg.flowupdater.download.json.CurseFileInfos;
 import fr.flowarg.flowupdater.download.json.CurseModPackInfos;
 import fr.flowarg.flowupdater.download.json.Mod;
+import fr.flowarg.flowupdater.download.json.OptifineInfo;
 import fr.flowarg.flowupdater.utils.ModFileDeleter;
 
 import java.io.BufferedInputStream;
@@ -27,7 +28,7 @@ public class NewForgeVersion extends AbstractForgeVersion
     private final String[] compatibleVersions = {"1.16", "1.15", "1.14", "1.13", "1.12.2-14.23.5.285"};
     private final boolean noGui;
 
-    NewForgeVersion(String forgeVersion, VanillaVersion vanilla, ILogger logger, IProgressCallback callback, List<Mod> mods, List<CurseFileInfos> curseMods, boolean noGui, ModFileDeleter fileDeleter, String optifine, CurseModPackInfos modPack)
+    NewForgeVersion(String forgeVersion, VanillaVersion vanilla, ILogger logger, IProgressCallback callback, List<Mod> mods, List<CurseFileInfos> curseMods, boolean noGui, ModFileDeleter fileDeleter, OptifineInfo optifine, CurseModPackInfos modPack)
     {
         super(logger, mods, curseMods, forgeVersion, vanilla, callback, fileDeleter, optifine, modPack);
         this.noGui = noGui;
diff --git a/src/main/java/fr/flowarg/flowupdater/versions/OldForgeVersion.java b/src/main/java/fr/flowarg/flowupdater/versions/OldForgeVersion.java
index b1a6f0e5..fdb644b6 100644
--- a/src/main/java/fr/flowarg/flowupdater/versions/OldForgeVersion.java
+++ b/src/main/java/fr/flowarg/flowupdater/versions/OldForgeVersion.java
@@ -6,6 +6,7 @@
 import fr.flowarg.flowupdater.download.json.CurseFileInfos;
 import fr.flowarg.flowupdater.download.json.CurseModPackInfos;
 import fr.flowarg.flowupdater.download.json.Mod;
+import fr.flowarg.flowupdater.download.json.OptifineInfo;
 import fr.flowarg.flowupdater.utils.ModFileDeleter;
 
 import java.io.BufferedInputStream;
@@ -25,7 +26,7 @@
  */
 public class OldForgeVersion extends AbstractForgeVersion
 {
-    OldForgeVersion(String forgeVersion, VanillaVersion vanilla, ILogger logger, IProgressCallback callback, List<Mod> mods, List<CurseFileInfos> curseMods, ModFileDeleter fileDeleter, String optifine, CurseModPackInfos modPack)
+    OldForgeVersion(String forgeVersion, VanillaVersion vanilla, ILogger logger, IProgressCallback callback, List<Mod> mods, List<CurseFileInfos> curseMods, ModFileDeleter fileDeleter, OptifineInfo optifine, CurseModPackInfos modPack)
     {
         super(logger, mods, curseMods, forgeVersion, vanilla, callback, fileDeleter, optifine, modPack);
     }