diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc7f2f134..df6f4cb63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 - Fixed security issue which allowed to execute shell command (by having access to Java's Class object) (#329)
 - Throw ParserException when endBlock not found (#308)
 - For tag : add enumeration support (#292)
+- Fix operator precedence (#290)
 
 ## v2.4.0 (2017-06-04)
 - Add arrays support for iterable test (#254)
diff --git a/src/main/java/com/mitchellbosecke/pebble/extension/core/CoreExtension.java b/src/main/java/com/mitchellbosecke/pebble/extension/core/CoreExtension.java
index 8e2f36e9d..be323c8c9 100644
--- a/src/main/java/com/mitchellbosecke/pebble/extension/core/CoreExtension.java
+++ b/src/main/java/com/mitchellbosecke/pebble/extension/core/CoreExtension.java
@@ -8,10 +8,51 @@
  ******************************************************************************/
 package com.mitchellbosecke.pebble.extension.core;
 
-import com.mitchellbosecke.pebble.extension.*;
-import com.mitchellbosecke.pebble.node.expression.*;
-import com.mitchellbosecke.pebble.operator.*;
-import com.mitchellbosecke.pebble.tokenParser.*;
+import com.mitchellbosecke.pebble.extension.AbstractExtension;
+import com.mitchellbosecke.pebble.extension.Filter;
+import com.mitchellbosecke.pebble.extension.Function;
+import com.mitchellbosecke.pebble.extension.NodeVisitorFactory;
+import com.mitchellbosecke.pebble.extension.Test;
+import com.mitchellbosecke.pebble.node.expression.AddExpression;
+import com.mitchellbosecke.pebble.node.expression.AndExpression;
+import com.mitchellbosecke.pebble.node.expression.ConcatenateExpression;
+import com.mitchellbosecke.pebble.node.expression.ContainsExpression;
+import com.mitchellbosecke.pebble.node.expression.DivideExpression;
+import com.mitchellbosecke.pebble.node.expression.EqualsExpression;
+import com.mitchellbosecke.pebble.node.expression.FilterExpression;
+import com.mitchellbosecke.pebble.node.expression.GreaterThanEqualsExpression;
+import com.mitchellbosecke.pebble.node.expression.GreaterThanExpression;
+import com.mitchellbosecke.pebble.node.expression.LessThanEqualsExpression;
+import com.mitchellbosecke.pebble.node.expression.LessThanExpression;
+import com.mitchellbosecke.pebble.node.expression.ModulusExpression;
+import com.mitchellbosecke.pebble.node.expression.MultiplyExpression;
+import com.mitchellbosecke.pebble.node.expression.NegativeTestExpression;
+import com.mitchellbosecke.pebble.node.expression.NotEqualsExpression;
+import com.mitchellbosecke.pebble.node.expression.OrExpression;
+import com.mitchellbosecke.pebble.node.expression.PositiveTestExpression;
+import com.mitchellbosecke.pebble.node.expression.RangeExpression;
+import com.mitchellbosecke.pebble.node.expression.SubtractExpression;
+import com.mitchellbosecke.pebble.node.expression.UnaryMinusExpression;
+import com.mitchellbosecke.pebble.node.expression.UnaryNotExpression;
+import com.mitchellbosecke.pebble.node.expression.UnaryPlusExpression;
+import com.mitchellbosecke.pebble.operator.Associativity;
+import com.mitchellbosecke.pebble.operator.BinaryOperator;
+import com.mitchellbosecke.pebble.operator.BinaryOperatorImpl;
+import com.mitchellbosecke.pebble.operator.UnaryOperator;
+import com.mitchellbosecke.pebble.operator.UnaryOperatorImpl;
+import com.mitchellbosecke.pebble.tokenParser.BlockTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.CacheTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.ExtendsTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.FilterTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.FlushTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.ForTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.IfTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.ImportTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.IncludeTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.MacroTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.ParallelTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.SetTokenParser;
+import com.mitchellbosecke.pebble.tokenParser.TokenParser;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -43,7 +84,7 @@ public List<TokenParser> getTokenParsers() {
     @Override
     public List<UnaryOperator> getUnaryOperators() {
         ArrayList<UnaryOperator> operators = new ArrayList<>();
-        operators.add(new UnaryOperatorImpl("not", 5, UnaryNotExpression.class));
+        operators.add(new UnaryOperatorImpl("not", 10, UnaryNotExpression.class));
         operators.add(new UnaryOperatorImpl("+", 500, UnaryPlusExpression.class));
         operators.add(new UnaryOperatorImpl("-", 500, UnaryMinusExpression.class));
         return operators;
@@ -52,8 +93,8 @@ public List<UnaryOperator> getUnaryOperators() {
     @Override
     public List<BinaryOperator> getBinaryOperators() {
         ArrayList<BinaryOperator> operators = new ArrayList<>();
-        operators.add(new BinaryOperatorImpl("or", 10, OrExpression.class, Associativity.LEFT));
-        operators.add(new BinaryOperatorImpl("and", 15, AndExpression.class, Associativity.LEFT));
+        operators.add(new BinaryOperatorImpl("or", 1, OrExpression.class, Associativity.LEFT));
+        operators.add(new BinaryOperatorImpl("and", 5, AndExpression.class, Associativity.LEFT));
         operators.add(new BinaryOperatorImpl("is", 20, PositiveTestExpression.class, Associativity.LEFT));
         operators.add(new BinaryOperatorImpl("is not", 20, NegativeTestExpression.class, Associativity.LEFT));
         operators.add(new BinaryOperatorImpl("contains", 20, ContainsExpression.class, Associativity.LEFT));
diff --git a/src/test/java/com/mitchellbosecke/pebble/CoreOperatorsTest.java b/src/test/java/com/mitchellbosecke/pebble/CoreOperatorsTest.java
index b18e66e8d..5c8bd6ffc 100644
--- a/src/test/java/com/mitchellbosecke/pebble/CoreOperatorsTest.java
+++ b/src/test/java/com/mitchellbosecke/pebble/CoreOperatorsTest.java
@@ -8,7 +8,12 @@
  ******************************************************************************/
 package com.mitchellbosecke.pebble;
 
-import static org.junit.Assert.assertEquals;
+import com.mitchellbosecke.pebble.error.PebbleException;
+import com.mitchellbosecke.pebble.loader.StringLoader;
+import com.mitchellbosecke.pebble.template.PebbleTemplate;
+import com.mitchellbosecke.pebble.utils.Pair;
+
+import org.junit.Test;
 
 import java.io.IOException;
 import java.io.StringWriter;
@@ -21,12 +26,7 @@
 import java.util.List;
 import java.util.Map;
 
-import org.junit.Test;
-
-import com.mitchellbosecke.pebble.error.PebbleException;
-import com.mitchellbosecke.pebble.loader.StringLoader;
-import com.mitchellbosecke.pebble.template.PebbleTemplate;
-import com.mitchellbosecke.pebble.utils.Pair;
+import static org.junit.Assert.assertEquals;
 
 public class CoreOperatorsTest extends AbstractTest {
 
@@ -221,6 +221,34 @@ public void testLogicOperatorOnAttributes() throws PebbleException, IOException
         assertEquals("noyes", writer.toString());
     }
 
+    @Test
+    public void testNotOperatorPrecedence() throws IOException {
+        PebbleEngine pebble = new PebbleEngine.Builder().loader(new StringLoader()).strictVariables(false).build();
+
+        String source = "{% if not item.falsy and not item.truthy %}This should not be displayed{% else %}All's good{% endif %}";
+        PebbleTemplate template = pebble.getTemplate(source);
+        Map<String, Object> context = new HashMap<>();
+        context.put("item", new Item());
+
+        Writer writer = new StringWriter();
+        template.evaluate(writer, context);
+        assertEquals("All's good", writer.toString());
+    }
+
+    @Test
+    public void testNotOperatorWithParenthesisPrecedence() throws IOException {
+        PebbleEngine pebble = new PebbleEngine.Builder().loader(new StringLoader()).strictVariables(false).build();
+
+        String source = "{% if (not item.falsy) and (not item.truthy) %}This should not be displayed{% else %}All's good{% endif %}";
+        PebbleTemplate template = pebble.getTemplate(source);
+        Map<String, Object> context = new HashMap<>();
+        context.put("item", new Item());
+
+        Writer writer = new StringWriter();
+        template.evaluate(writer, context);
+        assertEquals("All's good", writer.toString());
+    }
+
     @Test
     public void testTernary() throws PebbleException, IOException {