diff --git a/spring-boot-modules/spring-boot-validations/src/main/java/com/baeldung/deserializer/BooleanDeserializer.java b/spring-boot-modules/spring-boot-validations/src/main/java/com/baeldung/deserializer/BooleanDeserializer.java
index 5b50b75675..01a8e0eba0 100644
--- a/spring-boot-modules/spring-boot-validations/src/main/java/com/baeldung/deserializer/BooleanDeserializer.java
+++ b/spring-boot-modules/spring-boot-validations/src/main/java/com/baeldung/deserializer/BooleanDeserializer.java
@@ -10,12 +10,12 @@ public class BooleanDeserializer extends JsonDeserializer<Boolean> {
     @Override
     public Boolean deserialize(JsonParser parser, DeserializationContext context) throws IOException {
         String value = parser.getText();
-        if (value != null && (value.equals("TRUE") || value.equals("1") || value.equals("+"))) {
+        if (value != null && value.equals("+")) {
             return Boolean.TRUE;
-        } else if (value != null && (value.equals("FALSE") || value.equals("0") || value.equals("-"))) {
+        } else if (value != null && value.equals("-")) {
             return Boolean.FALSE;
         } else {
-            throw new IllegalArgumentException("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0");
+            throw new IllegalArgumentException("Only values accepted as Boolean are + and -");
         }
     }
 }
\ No newline at end of file
diff --git a/spring-boot-modules/spring-boot-validations/src/test/java/com/baeldung/controller/ValidationControllerUnitTest.java b/spring-boot-modules/spring-boot-validations/src/test/java/com/baeldung/controller/ValidationControllerUnitTest.java
index f312e1259c..73db4eb4eb 100644
--- a/spring-boot-modules/spring-boot-validations/src/test/java/com/baeldung/controller/ValidationControllerUnitTest.java
+++ b/spring-boot-modules/spring-boot-validations/src/test/java/com/baeldung/controller/ValidationControllerUnitTest.java
@@ -84,13 +84,13 @@ class ValidationControllerUnitTest {
             .getResponse()
             .getContentAsString();
 
-        assertEquals("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0", output);
+        assertEquals("Only values accepted as Boolean are + and -", output);
     }
 
     @Test
     void testInvalidBooleanFromJson() throws Exception {
 
-        String postBody = "{\"boolField\":true,\"trueField\":true,\"falseField\":false,\"boolStringVar\":\"6\"}";
+        String postBody = "{\"boolField\":true,\"trueField\":true,\"falseField\":false,\"boolStringVar\":\"plus\"}";
 
         String output = mockMvc.perform(post("/validateBoolean").contentType("application/json")
             .content(postBody))
@@ -98,7 +98,7 @@ class ValidationControllerUnitTest {
             .getResponse()
             .getContentAsString();
 
-        assertEquals("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0", output);
+        assertEquals("Only values accepted as Boolean are + and -", output);
 
     }