diff --git a/src/main/java/org/dependencytrack/model/Component.java b/src/main/java/org/dependencytrack/model/Component.java
index 6eec73ad7d..ef689b08f3 100644
--- a/src/main/java/org/dependencytrack/model/Component.java
+++ b/src/main/java/org/dependencytrack/model/Component.java
@@ -27,6 +27,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.github.packageurl.MalformedPackageURLException;
 import com.github.packageurl.PackageURL;
+import io.swagger.annotations.ApiModelProperty;
 import org.apache.commons.lang3.StringUtils;
 import org.dependencytrack.model.validation.ValidSpdxExpression;
 import org.dependencytrack.persistence.converter.OrganizationalEntityJsonConverter;
@@ -250,6 +251,7 @@ public enum FetchGroup {
     @Size(max = 255)
     @com.github.packageurl.validator.PackageURL
     @JsonDeserialize(using = TrimmedStringDeserializer.class)
+    @ApiModelProperty(dataType = "string")
     private String purl;
 
     @Persistent(defaultFetchGroup = "true")
diff --git a/src/main/java/org/dependencytrack/model/Project.java b/src/main/java/org/dependencytrack/model/Project.java
index 81a36fb203..1f8964b9b4 100644
--- a/src/main/java/org/dependencytrack/model/Project.java
+++ b/src/main/java/org/dependencytrack/model/Project.java
@@ -198,6 +198,7 @@ public enum FetchGroup {
     @Size(max = 255)
     @com.github.packageurl.validator.PackageURL
     @JsonDeserialize(using = TrimmedStringDeserializer.class)
+    @ApiModelProperty(dataType = "string")
     private String purl;
 
     @Persistent