diff --git a/rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskQueryFilterParameter.java b/rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskQueryFilterParameter.java
index ce89c62c8..1ed7e3370 100644
--- a/rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskQueryFilterParameter.java
+++ b/rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskQueryFilterParameter.java
@@ -525,7 +525,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
   // endregion
   // region classificationKey
   /** Filter by the classification key of the task. This is an exact match. */
-  @JsonProperty("classification.key")
+  @JsonProperty("classification-key")
   private final String[] classificationKeyIn;
 
   /** Filter by the classification key of the task. This is an exact match. */
@@ -719,7 +719,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
   // endregion
   // region primaryObjectReferenceCompany
   /** Filter by the company of the primary object reference of the task. This is an exact match. */
-  @JsonProperty("por.company")
+  @JsonProperty("por-company")
   private final String[] porCompanyIn;
 
   /**
@@ -747,7 +747,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
   // endregion
   // region primaryObjectReferenceSystem
   /** Filter by the system of the primary object reference of the task. This is an exact match. */
-  @JsonProperty("por.system")
+  @JsonProperty("por-system")
   private final String[] porSystemIn;
 
   /**
@@ -778,7 +778,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
    * Filter by the system instance of the primary object reference of the task. This is an exact
    * match.
    */
-  @JsonProperty("por.instance")
+  @JsonProperty("por-instance")
   private final String[] porInstanceIn;
 
   /**
@@ -806,7 +806,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
   // endregion
   // region primaryObjectReferenceSystemType
   /** Filter by the type of the primary object reference of the task. This is an exact match. */
-  @JsonProperty("por.type")
+  @JsonProperty("por-type")
   private final String[] porTypeIn;
 
   /**
@@ -834,7 +834,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
   // endregion
   // region primaryObjectReferenceSystemValue
   /** Filter by the value of the primary object reference of the task. This is an exact match. */
-  @JsonProperty("por.value")
+  @JsonProperty("por-value")
   private final String[] porValueIn;
 
   /**
@@ -1477,7 +1477,7 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
     "state-not",
     "classification-id",
     "classification-id-not",
-    "classification.key",
+    "classification-key",
     "classification-key-not",
     "classification-key-like",
     "classification-key-not-like",
@@ -1507,23 +1507,23 @@ public class TaskQueryFilterParameter implements QueryParameter<TaskQuery, Void>
     "owner-like",
     "owner-not-like",
     "por",
-    "por.company",
+    "por-company",
     "por-company-not",
     "por-company-like",
     "por-company-not-like",
-    "por.system",
+    "por-system",
     "por-system-not",
     "por-system-like",
     "por-system-not-like",
-    "por.instance",
+    "por-instance",
     "por-instance-not",
     "por-instance-like",
     "por-instance-not-like",
-    "por.type",
+    "por-type",
     "por-type-not",
     "por-type-like",
     "por-type-not-like",
-    "por.value",
+    "por-value",
     "por-value-not",
     "por-value-like",
     "por-value-not-like",
diff --git a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
index c93023476..1602f9988 100644
--- a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
+++ b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerIntTest.java
@@ -460,7 +460,7 @@ class TaskControllerIntTest {
   void testGetAllTasksKeepingFilters() {
     String url =
         restHelper.toUrl(RestEndpoints.URL_TASKS)
-            + "?por.type=VNR&por.value=22334455&sort-by=POR_VALUE&order=DESCENDING";
+            + "?por-type=VNR&por-value=22334455&sort-by=POR_VALUE&order=DESCENDING";
     HttpEntity<Object> auth = new HttpEntity<>(RestHelper.generateHeadersForUser("teamlead-1"));
 
     ResponseEntity<TaskSummaryPagedRepresentationModel> response =
@@ -470,7 +470,7 @@ class TaskControllerIntTest {
     assertThat((response.getBody()).getLink(IanaLinkRelations.SELF)).isNotNull();
     assertThat(response.getBody().getRequiredLink(IanaLinkRelations.SELF).getHref())
         .endsWith(
-            "/api/v1/tasks?por.type=VNR&por.value=22334455"
+            "/api/v1/tasks?por-type=VNR&por-value=22334455"
                 + "&sort-by=POR_VALUE&order=DESCENDING");
   }
 
@@ -542,8 +542,8 @@ class TaskControllerIntTest {
     // tasks and this test depends on the tasks as they are in sampledata
     String url =
         restHelper.toUrl(RestEndpoints.URL_TASKS)
-            + "?por.company=00&por.system=PASystem&por.instance=00&"
-            + "por.type=VNR&por.value=22334455&sort-by=POR_TYPE&"
+            + "?por-company=00&por-system=PASystem&por-instance=00&"
+            + "por-type=VNR&por-value=22334455&sort-by=POR_TYPE&"
             + "order=ASCENDING&page-size=5&page=2";
     HttpEntity<String> auth = new HttpEntity<>(RestHelper.generateHeadersForUser("teamlead-1"));
 
@@ -557,8 +557,8 @@ class TaskControllerIntTest {
     assertThat(response.getBody().getLink(IanaLinkRelations.SELF)).isNotNull();
     assertThat(response.getBody().getRequiredLink(IanaLinkRelations.SELF).getHref())
         .endsWith(
-            "/api/v1/tasks?por.company=00&por.system=PASystem&por.instance=00&"
-                + "por.type=VNR&por.value=22334455&sort-by=POR_TYPE&order=ASCENDING&"
+            "/api/v1/tasks?por-company=00&por-system=PASystem&por-instance=00&"
+                + "por-type=VNR&por-value=22334455&sort-by=POR_TYPE&order=ASCENDING&"
                 + "page-size=5&page=2");
     assertThat(response.getBody().getLink(IanaLinkRelations.FIRST)).isNotNull();
     assertThat(response.getBody().getLink(IanaLinkRelations.LAST)).isNotNull();
diff --git a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerRestDocTest.java b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerRestDocTest.java
index b66e5a6ca..7258c67a4 100644
--- a/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerRestDocTest.java
+++ b/rest/taskana-rest-spring/src/test/java/pro/taskana/task/rest/TaskControllerRestDocTest.java
@@ -30,7 +30,7 @@ class TaskControllerRestDocTest extends BaseRestDocTest {
   @Test
   void getAllTasksDocTest() throws Exception {
     mockMvc
-        .perform(get(RestEndpoints.URL_TASKS + "?por.type=VNR&por.value=22334455&sort-by=NAME"))
+        .perform(get(RestEndpoints.URL_TASKS + "?por-type=VNR&por-value=22334455&sort-by=NAME"))
         .andExpect(MockMvcResultMatchers.status().isOk());
   }
 
diff --git a/web/src/app/shared/models/task-query-filter-parameter.ts b/web/src/app/shared/models/task-query-filter-parameter.ts
index f0091d281..c7cc09eb4 100644
--- a/web/src/app/shared/models/task-query-filter-parameter.ts
+++ b/web/src/app/shared/models/task-query-filter-parameter.ts
@@ -5,18 +5,18 @@ export interface TaskQueryFilterParameter {
   'name-like'?: string[];
   priority?: number[];
   state?: TaskState[];
-  'classification.key'?: string[];
+  'classification-key'?: string[];
   'task-id'?: string[];
   'workbasket-id'?: string[];
   'workbasket-key'?: string[];
   domain?: string[];
   owner?: string[];
   'owner-like'?: string[];
-  'por.company'?: string[];
-  'por.system'?: string[];
-  'por.instance'?: string[];
-  'por.type'?: string[];
-  'por.value'?: string[];
+  'por-company'?: string[];
+  'por-system'?: string[];
+  'por-instance'?: string[];
+  'por-type'?: string[];
+  'por-value'?: string[];
   planned?: string[];
   'planned-from'?: string[];
   'planned-until'?: string[];
diff --git a/web/src/app/shared/store/filter-store/filter.state.ts b/web/src/app/shared/store/filter-store/filter.state.ts
index bc50e7d2b..31d6987ad 100644
--- a/web/src/app/shared/store/filter-store/filter.state.ts
+++ b/web/src/app/shared/store/filter-store/filter.state.ts
@@ -17,7 +17,7 @@ const emptyTaskFilter: TaskQueryFilterParameter = {
   'owner-like': [],
   state: [],
   priority: [],
-  'por.value': [],
+  'por-value': [],
   'wildcard-search-fields': [],
   'wildcard-search-value': []
 };
diff --git a/web/src/app/shared/util/query-parameters.ts b/web/src/app/shared/util/query-parameters.ts
index f8ebb13cb..3ab63dd0e 100644
--- a/web/src/app/shared/util/query-parameters.ts
+++ b/web/src/app/shared/util/query-parameters.ts
@@ -17,8 +17,8 @@ export class TaskanaQueryParameters {
     PRIORITY: 'priority',
     STATE: 'state',
     WORKBASKET_ID: 'workbasket-id',
-    TASK_PRIMARY_OBJ_REF_TYPE_LIKE: 'por.type',
-    TASK_PRIMARY_OBJ_REF_VALUE_LIKE: 'por.value',
+    TASK_PRIMARY_OBJ_REF_TYPE_LIKE: 'por-type',
+    TASK_PRIMARY_OBJ_REF_VALUE_LIKE: 'por-value',
     // Access
     REQUIREDPERMISSION: 'required-permission',
     ACCESSIDS: 'access-ids',