diff --git a/app/src/main/java/app/fedilab/android/client/endpoints/MastodonFiltersService.java b/app/src/main/java/app/fedilab/android/client/endpoints/MastodonFiltersService.java
index eea84592..e3de3d47 100644
--- a/app/src/main/java/app/fedilab/android/client/endpoints/MastodonFiltersService.java
+++ b/app/src/main/java/app/fedilab/android/client/endpoints/MastodonFiltersService.java
@@ -53,7 +53,7 @@ public interface MastodonFiltersService {
             @Field("expires_at") Date expires_at,
             @Field("filter_action") String filter_action,
             @Field("context[]") List<String> context,
-            @Field("keywords_attributes") List<Filter.KeywordsAttributes> keywordsAttributes
+            @Field("keywords_attributes[]") List<Filter.KeywordsAttributes> keywordsAttributes
     );
 
     //Edit a filter
@@ -66,7 +66,7 @@ public interface MastodonFiltersService {
             @Field("expires_at") Date expires_at,
             @Field("filter_action") String filter_action,
             @Field("context[]") List<String> context,
-            @Field("keywords_attributes") List<Filter.KeywordsAttributes> keywordsAttributes
+            @Field("keywords_attributes[]") List<Filter.KeywordsAttributes> keywordsAttributes
     );
 
     //Remove a filter
diff --git a/app/src/main/java/app/fedilab/android/client/entities/api/Filter.java b/app/src/main/java/app/fedilab/android/client/entities/api/Filter.java
index 35e266d6..70a2cefe 100644
--- a/app/src/main/java/app/fedilab/android/client/entities/api/Filter.java
+++ b/app/src/main/java/app/fedilab/android/client/entities/api/Filter.java
@@ -59,14 +59,14 @@ public class Filter implements Serializable {
         public String filter_action;
     }
 
-    public static class Keyword {
+    public static class Keyword implements Serializable {
         @SerializedName("keyword")
         public String keyword;
         @SerializedName("whole_word")
         public boolean whole_word;
     }
 
-    public static class KeywordsAttributes {
+    public static class KeywordsAttributes implements Serializable {
         @SerializedName("id")
         public String id;
         @SerializedName("keyword")