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 c9f30dc6e3..5b50b75675 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
@@ -8,11 +8,14 @@ import com.fasterxml.jackson.databind.JsonDeserializer;
 
 public class BooleanDeserializer extends JsonDeserializer<Boolean> {
     @Override
-    public Boolean deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
-        String value = p.getText();
-        if (value != null && !value.equals("TRUE") && !value.equals("FALSE")) {
-            throw new IllegalArgumentException("Boolean value must come as Capital TRUE or FALSE");
+    public Boolean deserialize(JsonParser parser, DeserializationContext context) throws IOException {
+        String value = parser.getText();
+        if (value != null && (value.equals("TRUE") || value.equals("1") || value.equals("+"))) {
+            return Boolean.TRUE;
+        } else if (value != null && (value.equals("FALSE") || value.equals("0") || value.equals("-"))) {
+            return Boolean.FALSE;
+        } else {
+            throw new IllegalArgumentException("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0");
         }
-        return Boolean.valueOf(value);
     }
 }
\ 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 78950e4c0e..0ff786bd4c 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
@@ -84,7 +84,22 @@ class ValidationControllerUnitTest {
             .getResponse()
             .getContentAsString();
 
-        assertEquals("Boolean value must come as Capital TRUE or FALSE", output);
+        assertEquals("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0", output);
+    }
+
+    @Test
+    void testInvalidBooleanFromJson() throws Exception {
+
+        String postBody = "{\"boolField\":true,\"trueField\":true,\"falseField\":false,\"boolStringVar\":\"6\"}";
+
+        String output = mockMvc.perform(post("/validateBoolean").contentType("application/json")
+            .content(postBody))
+            .andReturn()
+            .getResponse()
+            .getContentAsString();
+
+        assertEquals("Only values accepted as Boolean are TRUE, FALSE, +, -, 1 , 0", output);
+
     }
 
     @Test