diff --git a/oparl-server/src/main/java/de/twomartens/oparlservice/entity/Organization.java b/oparl-server/src/main/java/de/twomartens/oparlservice/entity/Organization.java
index 7fd724d..445441a 100644
--- a/oparl-server/src/main/java/de/twomartens/oparlservice/entity/Organization.java
+++ b/oparl-server/src/main/java/de/twomartens/oparlservice/entity/Organization.java
@@ -73,7 +73,7 @@ public class Organization {
 
     @Schema(description = "rough categorization of the organization", nullable = true,
             allowableValues = "Gremium, Partei, Fraktion, Verwaltungsbereich, externes Gremium, Institution, Sonstiges")
-    private final String organizationType;
+    private final OrganizationType organizationType;
 
     @Schema(description = "type of organization", nullable = true)
     private final String classification;
diff --git a/oparl-server/src/main/java/de/twomartens/oparlservice/entity/OrganizationType.java b/oparl-server/src/main/java/de/twomartens/oparlservice/entity/OrganizationType.java
new file mode 100644
index 0000000..3ff70ac
--- /dev/null
+++ b/oparl-server/src/main/java/de/twomartens/oparlservice/entity/OrganizationType.java
@@ -0,0 +1,21 @@
+package de.twomartens.oparlservice.entity;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.ToString;
+
+@RequiredArgsConstructor
+@Getter(onMethod_={@JsonValue})
+@ToString
+public enum OrganizationType {
+    BODY("Gremium"),
+    PARTY("Partei"),
+    FACTION("Fraktion"),
+    ADMINISTRATIVE_AREA("Verwaltungsbereich"),
+    EXTERNAL_BODY("externes Gremium"),
+    INSTITUTION("Institution"),
+    OTHER("Sonstiges");
+
+    private final String value;
+}