diff --git a/gitlab4j-models/src/main/java/org/gitlab4j/api/models/GroupFilter.java b/gitlab4j-models/src/main/java/org/gitlab4j/api/models/GroupFilter.java
index 9e165455..f551c4a4 100644
--- a/gitlab4j-models/src/main/java/org/gitlab4j/api/models/GroupFilter.java
+++ b/gitlab4j-models/src/main/java/org/gitlab4j/api/models/GroupFilter.java
@@ -15,7 +15,7 @@
 public class GroupFilter implements Serializable {
     private static final long serialVersionUID = 1L;
 
-    private List<Integer> skipGroups;
+    private List<Long> skipGroups;
     private Boolean allAvailable;
     private String search;
     private GroupOrderBy orderBy;
@@ -33,7 +33,7 @@ public class GroupFilter implements Serializable {
      * @param skipGroups List of group IDs to not include in the search
      * @return the reference to this GroupFilter instance
      */
-    public GroupFilter withSkipGroups(List<Integer> skipGroups) {
+    public GroupFilter withSkipGroups(List<Long> skipGroups) {
         this.skipGroups = skipGroups;
         return (this);
     }
diff --git a/gitlab4j-models/src/main/java/org/gitlab4j/api/models/IssueFilter.java b/gitlab4j-models/src/main/java/org/gitlab4j/api/models/IssueFilter.java
index 0e50e8ef..04b30efb 100644
--- a/gitlab4j-models/src/main/java/org/gitlab4j/api/models/IssueFilter.java
+++ b/gitlab4j-models/src/main/java/org/gitlab4j/api/models/IssueFilter.java
@@ -26,9 +26,9 @@ public class IssueFilter implements Serializable {
     private static final long serialVersionUID = 1L;
 
     /**
-     * Return only the milestone having the given iid.
+     * Return only the issues having the given iid.
      */
-    private List<String> iids;
+    private List<Long> iids;
 
     /**
      * {@link org.gitlab4j.models.Constants.IssueState} Return all issues or just those that are opened or closed.
@@ -146,11 +146,11 @@ public String toString() {
     }
 
     /*- properties -*/
-    public List<String> getIids() {
+    public List<Long> getIids() {
         return iids;
     }
 
-    public void setIids(List<String> iids) {
+    public void setIids(List<Long> iids) {
         this.iids = iids;
     }
 
@@ -291,7 +291,7 @@ public void setNot(Map<IssueField, Object> not) {
     }
 
     /*- builder -*/
-    public IssueFilter withIids(List<String> iids) {
+    public IssueFilter withIids(List<Long> iids) {
         this.iids = iids;
         return (this);
     }