diff --git a/android/src/main/java/com/pspdfkit/react/helper/ConversionHelpers.java b/android/src/main/java/com/pspdfkit/react/helper/ConversionHelpers.java
index 5f296765..8b7929e3 100644
--- a/android/src/main/java/com/pspdfkit/react/helper/ConversionHelpers.java
+++ b/android/src/main/java/com/pspdfkit/react/helper/ConversionHelpers.java
@@ -51,6 +51,9 @@ public static EnumSet<AnnotationType> getAnnotationTypeFromString(@Nullable fina
         if ("pspdfkit/text".equalsIgnoreCase(type)) {
             return EnumSet.of(AnnotationType.FREETEXT);
         }
+        if ("pspdfkit/stamp".equalsIgnoreCase(type)) {
+            return EnumSet.of(AnnotationType.STAMP);
+        }
         return EnumSet.noneOf(AnnotationType.class);
     }
 }
diff --git a/ios/RCTPSPDFKit/Converters/RCTConvert+PSPDFAnnotation.m b/ios/RCTPSPDFKit/Converters/RCTConvert+PSPDFAnnotation.m
index 511a3cd9..7471365f 100644
--- a/ios/RCTPSPDFKit/Converters/RCTConvert+PSPDFAnnotation.m
+++ b/ios/RCTPSPDFKit/Converters/RCTConvert+PSPDFAnnotation.m
@@ -54,10 +54,14 @@ + (PSPDFAnnotationType)annotationTypeFromInstantJSONType:(NSString *)type {
     return PSPDFAnnotationTypeLine;
   } else if ([type isEqualToString:@"pspdfkit/shape/polygon"]) {
     return PSPDFAnnotationTypePolygon;
+  } else if ([type isEqualToString:@"pspdfkit/shape/polyline"]) {
+    return PSPDFAnnotationTypePolyLine;
   } else if ([type isEqualToString:@"pspdfkit/shape/rectangle"]) {
     return PSPDFAnnotationTypeSquare;
   } else if ([type isEqualToString:@"pspdfkit/text"]) {
     return PSPDFAnnotationTypeFreeText;
+  } else if ([type isEqualToString:@"pspdfkit/stamp"]) {
+    return PSPDFAnnotationTypeStamp;
   } else {
     return PSPDFAnnotationTypeUndefined;
   }