diff --git a/app/build.gradle b/app/build.gradle
index 94cf7c9f..6644ba75 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "ml.docilealligator.infinityforreddit"
         minSdk 21
         targetSdk 33
-        versionCode 110
-        versionName "5.4.0-beta2"
+        versionCode 111
+        versionName "5.4.0-beta3"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         javaCompileOptions {
             annotationProcessorOptions {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
index b1119059..2daef67b 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewUserDetailActivity.java
@@ -111,6 +111,7 @@ import ml.docilealligator.infinityforreddit.post.PostPagingSource;
 import ml.docilealligator.infinityforreddit.readpost.InsertReadPost;
 import ml.docilealligator.infinityforreddit.subreddit.ParseSubredditData;
 import ml.docilealligator.infinityforreddit.subreddit.SubredditData;
+import ml.docilealligator.infinityforreddit.user.BlockUser;
 import ml.docilealligator.infinityforreddit.user.FetchUserData;
 import ml.docilealligator.infinityforreddit.user.UserDao;
 import ml.docilealligator.infinityforreddit.user.UserData;
@@ -1119,6 +1120,7 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
         if (username.equals(mAccountName)) {
             menu.findItem(R.id.action_send_private_message_view_user_detail_activity).setVisible(false);
             menu.findItem(R.id.action_report_view_user_detail_activity).setVisible(false);
+            menu.findItem(R.id.action_block_user_view_user_detail_activity).setVisible(false);
         } else {
             menu.findItem(R.id.action_edit_profile_view_user_detail_activity).setVisible(false);
         }
@@ -1187,6 +1189,30 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
             reportIntent.setData(Uri.parse("https://www.reddithelp.com/en/categories/rules-reporting/account-and-community-restrictions/what-should-i-do-if-i-see-something-i"));
             startActivity(reportIntent);
             return true;
+        } else if (itemId == R.id.action_block_user_view_user_detail_activity) {
+            if (mAccessToken == null) {
+                Toast.makeText(this, R.string.login_first, Toast.LENGTH_SHORT).show();
+                return true;
+            }
+
+            new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                    .setTitle(R.string.block_user)
+                    .setMessage(R.string.are_you_sure)
+                    .setPositiveButton(R.string.yes, (dialogInterface, i)
+                            -> BlockUser.blockUser(mOauthRetrofit, mAccessToken, username, new BlockUser.BlockUserListener() {
+                        @Override
+                        public void success() {
+                            Toast.makeText(ViewUserDetailActivity.this, R.string.block_user_success, Toast.LENGTH_SHORT).show();
+                        }
+
+                        @Override
+                        public void failed() {
+                            Toast.makeText(ViewUserDetailActivity.this, R.string.block_user_failed, Toast.LENGTH_SHORT).show();
+                        }
+                    }))
+                    .setNegativeButton(R.string.no, null)
+                    .show();
+            return true;
         } else if (itemId == R.id.action_edit_profile_view_user_detail_activity) {
             startActivity(new Intent(this, EditProfileActivity.class));
             return true;
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java b/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
index 07119b1f..41d44d38 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
@@ -215,6 +215,10 @@ public interface RedditAPI {
     @POST("/api/compose")
     Call<String> composePrivateMessage(@HeaderMap Map<String, String> headers, @FieldMap Map<String, String> params);
 
+    @FormUrlEncoded
+    @POST("api/block_user")
+    Call<String> blockUser(@HeaderMap Map<String, String> headers, @FieldMap Map<String, String> params);
+
     @GET("r/{subredditName}/api/user_flair_v2.json?raw_json=1")
     Call<String> getUserFlairs(@HeaderMap Map<String, String> headers, @Path("subredditName") String subredditName);
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/user/BlockUser.java b/app/src/main/java/ml/docilealligator/infinityforreddit/user/BlockUser.java
new file mode 100644
index 00000000..c7a7207e
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/user/BlockUser.java
@@ -0,0 +1,40 @@
+package ml.docilealligator.infinityforreddit.user;
+
+import androidx.annotation.NonNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import ml.docilealligator.infinityforreddit.apis.RedditAPI;
+import ml.docilealligator.infinityforreddit.utils.APIUtils;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+
+public class BlockUser {
+    public interface BlockUserListener {
+        void success();
+        void failed();
+    }
+
+    public static void blockUser(Retrofit oauthRetrofit, String accessToken, String username, BlockUserListener blockUserListener) {
+        Map<String, String> params = new HashMap<>();
+        params.put(APIUtils.NAME_KEY, username);
+        oauthRetrofit.create(RedditAPI.class).blockUser(APIUtils.getOAuthHeader(accessToken), params).enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(@NonNull Call<String> call, @NonNull Response<String> response) {
+                if (response.isSuccessful()) {
+                    blockUserListener.success();
+                } else {
+                    blockUserListener.failed();
+                }
+            }
+
+            @Override
+            public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
+                blockUserListener.failed();
+            }
+        });
+    }
+}
diff --git a/app/src/main/res/menu/view_user_detail_activity.xml b/app/src/main/res/menu/view_user_detail_activity.xml
index 41e3527a..ec9128e4 100644
--- a/app/src/main/res/menu/view_user_detail_activity.xml
+++ b/app/src/main/res/menu/view_user_detail_activity.xml
@@ -55,6 +55,11 @@
         android:orderInCategory="9"
         android:title="@string/action_report" />
 
+    <item
+        android:id="@+id/action_block_user_view_user_detail_activity"
+        android:orderInCategory="10"
+        android:title="@string/action_block_user" />
+
     <item
         android:id="@+id/action_edit_profile_view_user_detail_activity"
         android:orderInCategory="11"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d4986fc8..2b77b298 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -79,6 +79,7 @@
     <string name="action_crosspost">Crosspost</string>
     <string name="action_set_wallpaper">Set as Wallpaper</string>
     <string name="action_send_private_message">Send Private Message</string>
+    <string name="action_block_user">Block User</string>
     <string name="action_select_user_flair">Select User Flair</string>
     <string name="action_give_award">Give Award</string>
     <string name="action_save_to_database">Save to Database</string>
@@ -1053,6 +1054,10 @@
 
     <string name="login_activity_2fa_prompt">If you have 2-factor authentication enabled, kindly type your password like the following: &lt;password&gt;:&lt;2FA code&gt;.\nExample: yourpass:123456</string>
 
+    <string name="block_user">Block User</string>
+    <string name="block_user_success">Blocked</string>
+    <string name="block_user_failed">Failed to block user</string>
+
     <string name="select_user_flair_success">User flair selected</string>
     <string name="select_this_user_flair">Select this user flair?</string>
     <string name="clear_user_flair">Clear Flair</string>