diff --git a/README.md b/README.md
index 698f17d39..fe6a12a0f 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ To utilize the GitLab API for Java in your project, simply add the following dep
 ```java
 dependencies {
     ...
-    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.8.54'
+    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.8.56'
 }
 ```
 
@@ -22,7 +22,7 @@ dependencies {
 <dependency>
     <groupId>org.gitlab4j</groupId>
     <artifactId>gitlab4j-api</artifactId>
-    <version>4.8.54</version>
+    <version>4.8.56</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index 2bb81a20f..a179cbf5e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<groupId>org.gitlab4j</groupId>
 	<artifactId>gitlab4j-api</artifactId>
 	<packaging>jar</packaging>
-	<version>4.8.55-SNAPSHOT</version>
+	<version>4.8.57-SNAPSHOT</version>
 	<name>GitLab API Java Client</name>
 	<description>GitLab API for Java (gitlab4j-api) provides a full featured Java API for working with GitLab repositories via the GitLab REST API.</description>
 	<url>https://github.com/gmessner/gitlab4j-api</url>
diff --git a/src/main/java/org/gitlab4j/api/GroupApi.java b/src/main/java/org/gitlab4j/api/GroupApi.java
index 1e1283f93..507949ff7 100644
--- a/src/main/java/org/gitlab4j/api/GroupApi.java
+++ b/src/main/java/org/gitlab4j/api/GroupApi.java
@@ -13,6 +13,7 @@
 import org.gitlab4j.api.models.Group;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Project;
+import org.gitlab4j.api.models.GroupProjectsFilter;
 import org.gitlab4j.api.models.Visibility;
 
 /**
@@ -224,6 +225,38 @@ public Pager<Group> getSubGroups(Integer groupId, List<Integer> skipGroups, Bool
         return (new Pager<Group>(this, Group.class, itemsPerPage, formData.asMap(), "groups", groupId, "subgroups"));
     }
 
+    /**
+     * Get a list of projects belonging to the specified group ID and filter.
+     *
+     * GET /groups/:id/projects
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @param filter the GroupProjectsFilter instance holding the filter values for the query
+     * @return a List containing Project instances that belong to the group and match the provided filter
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Project> getProjects(Object groupIdOrPath, GroupProjectsFilter filter) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        Response response = get(Response.Status.OK, formData.asMap(), "groups", getGroupIdOrPath(groupIdOrPath), "projects");
+        return (response.readEntity(new GenericType<List<Project>>() {}));
+    }
+
+    /**
+     * Get a Pager of projects belonging to the specified group ID and filter.
+     *
+     * GET /groups/:id/projects
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @param filter the GroupProjectsFilter instance holding the filter values for the query
+     * @param itemsPerPage the number of Project instances that will be fetched per page
+     * @return a Pager containing Project instances that belong to the group and match the provided filter
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Pager<Project> getProjects(Object groupIdOrPath, GroupProjectsFilter filter, int itemsPerPage) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        return (new Pager<Project>(this, Project.class, itemsPerPage, formData.asMap(), "groups", getGroupIdOrPath(groupIdOrPath), "projects"));
+    }
+
     /**
      * Get a list of projects belonging to the specified group ID.
      *
diff --git a/src/main/java/org/gitlab4j/api/JobApi.java b/src/main/java/org/gitlab4j/api/JobApi.java
index 6e7737ba7..5739a0e23 100644
--- a/src/main/java/org/gitlab4j/api/JobApi.java
+++ b/src/main/java/org/gitlab4j/api/JobApi.java
@@ -332,7 +332,9 @@ public InputStream downloadArtifactsFile(Object projectIdOrPath, Integer jobId,
      */
     public File downloadSingleArtifactsFile(Object projectIdOrPath, Integer jobId, Path artifactPath, File directory) throws GitLabApiException {
 
-        Response response = get(Response.Status.OK, getDefaultPerPageParam(), "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "artifacts", artifactPath);
+        String path = artifactPath.toString().replace("\\", "/");
+        Response response = get(Response.Status.OK, getDefaultPerPageParam(),
+                "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "artifacts", path);
         try {
 
             if (directory == null)
@@ -364,7 +366,9 @@ public File downloadSingleArtifactsFile(Object projectIdOrPath, Integer jobId, P
      * @throws GitLabApiException if any exception occurs
      */
     public InputStream downloadSingleArtifactsFile(Object projectIdOrPath, Integer jobId, Path artifactPath) throws GitLabApiException {
-        Response response = get(Response.Status.OK, getDefaultPerPageParam(), "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "artifacts", artifactPath);
+        String path = artifactPath.toString().replace("\\", "/");
+        Response response = get(Response.Status.OK, getDefaultPerPageParam(),
+                "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "artifacts", path);
         return (response.readEntity(InputStream.class));
     }
 
@@ -380,7 +384,8 @@ public InputStream downloadSingleArtifactsFile(Object projectIdOrPath, Integer j
      * @throws GitLabApiException if any exception occurs during execution
      */
      public String getTrace(Object projectIdOrPath, int jobId) throws GitLabApiException {
-        Response response = get(Response.Status.OK, getDefaultPerPageParam(), "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "trace");
+        Response response = get(Response.Status.OK, getDefaultPerPageParam(),
+                "projects", getProjectIdOrPath(projectIdOrPath), "jobs", jobId, "trace");
         return (response.readEntity(String.class));
      }
 
diff --git a/src/main/java/org/gitlab4j/api/models/GroupProjectsFilter.java b/src/main/java/org/gitlab4j/api/models/GroupProjectsFilter.java
new file mode 100644
index 000000000..be359d9ab
--- /dev/null
+++ b/src/main/java/org/gitlab4j/api/models/GroupProjectsFilter.java
@@ -0,0 +1,166 @@
+package org.gitlab4j.api.models;
+
+import org.gitlab4j.api.Constants.ProjectOrderBy;
+import org.gitlab4j.api.Constants.SortOrder;
+import org.gitlab4j.api.GitLabApiForm;
+
+/**
+ *  This class is used to filter Projects when getting lists of projects for a specified group.
+ */
+public class GroupProjectsFilter {
+
+    private Boolean archived;
+    private Visibility visibility;
+    private ProjectOrderBy orderBy;
+    private SortOrder sort;
+    private String search;
+    private Boolean simple;
+    private Boolean owned;
+    private Boolean starred;
+    private Boolean withCustomAttributes;
+    private Boolean withIssuesEnabled;
+    private Boolean withMergeRequestsEnabled;
+
+    /**
+     * Limit by archived status.
+     *
+     * @param archived if true will only return archived projects
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withArchived(Boolean archived) {
+        this.archived = archived;
+        return (this);  
+    }
+
+    /**
+     * Limit by visibility public, internal, or private.
+     *
+     * @param visibility the visibility to match
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withVisibility(Visibility visibility) {
+        this.visibility = visibility;
+        return (this);       
+    }
+
+    /**
+     * Return projects ordered by id, name, path, created_at, updated_at, or last_activity_at fields. Default is created_at.
+     *
+     * @param orderBy specifies what field to order by
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withOrderBy(ProjectOrderBy orderBy) {
+        this.orderBy = orderBy;
+        return (this);
+    }
+
+    /**
+     * Return projects sorted in asc or desc order. Default is desc.
+     *
+     * @param sort sort direction, ASC or DESC
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withSortOder(SortOrder sort) {
+        this.sort = sort;
+        return (this);
+    }
+
+    /**
+     * Return list of projects matching the search criteria.
+     *
+     * @param search the search criteria
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withSearch(String search) {
+        this.search = search;
+        return (this);
+    }
+
+    /**
+     * Return only limited fields for each project. This is a no-op without 
+     * authentication as then only simple fields are returned.
+     *
+     * @param simple if true, return only limited fields for each project
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withSimple(Boolean simple) {
+        this.simple = simple;
+        return (this);
+    }
+
+    /**
+     * Limit by projects explicitly owned by the current user
+     *
+     * @param owned if true, limit to projects explicitly owned by the current user
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withOwned(Boolean owned) {
+        this.owned = owned;
+        return (this);
+    }
+
+    /**
+     * Limit by projects starred by the current user.
+     *
+     * @param starred if true, limit by projects starred by the current user
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withStarred(Boolean starred) {
+        this.starred = starred;
+        return (this);
+    }
+
+    /**
+     *  Include custom attributes in response (admins only).
+     * 
+     * @param withCustomAttributes if true, include custom attributes in the repsonse
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withCustomAttributes(Boolean withCustomAttributes) {
+        this.withCustomAttributes = withCustomAttributes;
+        return (this);
+    }
+
+    /**
+     * Limit by enabled issues feature
+     *
+     * @param withIssuesEnabled if true, limit by enabled issues feature
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withIssuesEnabled(Boolean withIssuesEnabled) {
+        this.withIssuesEnabled = withIssuesEnabled;
+        return (this);
+    }
+
+    /**
+     * Limit by enabled merge requests feature
+     *
+     * @param withMergeRequestsEnabled if true, imit by enabled merge requests feature
+     * @return the reference to this ProjectFilter instance
+     */
+    public GroupProjectsFilter withMergeRequestsEnabled(Boolean withMergeRequestsEnabled) {
+        this.withMergeRequestsEnabled = withMergeRequestsEnabled;
+        return (this);
+    }
+
+    /**
+     * Get the query params specified by this filter.
+     *
+     * @return a GitLabApiForm instance holding the query parameters for this ProjectFilter instance
+     */
+    public GitLabApiForm getQueryParams() {
+        return (new GitLabApiForm()
+            .withParam("archived", archived)
+            .withParam("visibility", visibility)
+            .withParam("order_by", orderBy)
+            .withParam("sort", sort)
+            .withParam("search", search)
+            .withParam("simple", simple)
+            .withParam("owned", owned)
+            .withParam("starred", starred)
+            .withParam("with_custom_attributes", withCustomAttributes)
+            .withParam("with_issues_enabled", withIssuesEnabled)
+            .withParam("with_merge_requests_enabled ", withMergeRequestsEnabled)
+        );
+    }
+}