diff --git a/lib/analyzer/lexer.mll b/lib/analyzer/lexer.mll
index 9c1dd67..77fe331 100644
--- a/lib/analyzer/lexer.mll
+++ b/lib/analyzer/lexer.mll
@@ -34,9 +34,19 @@ rule token = parse
   | '-' { MINUS }
   | '*' { TIMES }
   | '/' { DIV }
+  | "==" { EQUAL_EQUAL }
+  | "!=" { NOT_EQUAL }
+  | "<" { LESS_THAN }
+  | "<=" { LESS_THAN_EQUAL }
+  | ">" { GREATER_THAN }
+  | ">=" { GREATER_THAN_EQUAL }
+  | "&&" { AMPERSAND_AMPERSAND }
+  | "||" { BAR_BAR }
+  | "!" { EXCLAMATION }
 
   (* Keywords *)
-  (* ... *)
+  | "vrai" { BOOLEAN(true) }
+  | "faux" { BOOLEAN(false) }
 
   (* Literals *)
   | interger as i { INT (int_of_string i) }
diff --git a/lib/analyzer/parser.mly b/lib/analyzer/parser.mly
index 752ea9b..42c8ea6 100644
--- a/lib/analyzer/parser.mly
+++ b/lib/analyzer/parser.mly
@@ -5,6 +5,7 @@ open Syntax
 %token <int> INT
 %token <float> FLOAT
 %token <char> CHARACTER
+%token <bool> BOOLEAN
 %token <string> STRING
 %token <string> IDENTIFIER
 %token NULL
@@ -13,6 +14,15 @@ open Syntax
 %token MINUS "-"
 %token TIMES "*"
 %token DIV "/"
+%token EQUAL_EQUAL "=="
+%token NOT_EQUAL "!="
+%token LESS_THAN "<"
+%token LESS_THAN_EQUAL "<="
+%token GREATER_THAN ">"
+%token GREATER_THAN_EQUAL ">="
+%token AMPERSAND_AMPERSAND "&&"
+%token BAR_BAR "||"
+%token EXCLAMATION "!"
 
 %token SEMICOLON ";"
 
@@ -50,15 +60,25 @@ expression:
 literal:
   | INT { Literals.Integer($1) }
   | FLOAT { Literals.Float($1) }
+  | BOOLEAN { Literals.Boolean($1) }
   | CHARACTER { Literals.Character($1) }
   | STRING { Literals.String($1) }
   | NULL { Literals.Null }
 
 unary_expression:
   | "-" expression %prec UMINUS { Expressions.UnaryExpression(UnaryOperators.ArithmeticNegation, $2) }
+  | "!" expression { Expressions.UnaryExpression(UnaryOperators.LogicalNegation, $2) }
 
 binary_expression:
   | expression "+" expression { Expressions.BinaryExpression (BinaryOperators.Add, $1, $3) }
   | expression "-" expression { Expressions.BinaryExpression (BinaryOperators.Subtract, $1, $3) }
   | expression "*" expression { Expressions.BinaryExpression (BinaryOperators.Multiply, $1, $3) }
-  | expression "/" expression { Expressions.BinaryExpression (BinaryOperators.Divide, $1, $3) }
\ No newline at end of file
+  | expression "/" expression { Expressions.BinaryExpression (BinaryOperators.Divide, $1, $3) }
+  | expression "==" expression { Expressions.BinaryExpression (BinaryOperators.Equals, $1, $3) }
+  | expression "!=" expression { Expressions.BinaryExpression (BinaryOperators.NotEquals, $1, $3) }
+  | expression "<" expression { Expressions.BinaryExpression (BinaryOperators.LessThan, $1, $3) }
+  | expression "<=" expression { Expressions.BinaryExpression (BinaryOperators.LessThanEquals, $1, $3) }
+  | expression ">" expression { Expressions.BinaryExpression (BinaryOperators.GreaterThan, $1, $3) }
+  | expression ">=" expression { Expressions.BinaryExpression (BinaryOperators.GreaterThanEquals, $1, $3) }
+  | expression "&&" expression { Expressions.BinaryExpression (BinaryOperators.And, $1, $3) }
+  | expression "||" expression { Expressions.BinaryExpression (BinaryOperators.Or, $1, $3) }
\ No newline at end of file
diff --git a/lib/syntax/BinaryOperators.ml b/lib/syntax/BinaryOperators.ml
index bf2b571..7a83041 100644
--- a/lib/syntax/BinaryOperators.ml
+++ b/lib/syntax/BinaryOperators.ml
@@ -1,7 +1,27 @@
-type binary_operators = Add | Subtract | Multiply | Divide
+type binary_operators =
+  | Add
+  | Subtract
+  | Multiply
+  | Divide
+  | Equals
+  | NotEquals
+  | LessThan
+  | LessThanEquals
+  | GreaterThan
+  | GreaterThanEquals
+  | And
+  | Or
 
 let pp_binary_operators = function
   | Add -> "Add"
   | Subtract -> "Subtract"
   | Multiply -> "Multiply"
   | Divide -> "Divide"
+  | Equals -> "Equals"
+  | NotEquals -> "NotEquals"
+  | LessThan -> "LessThan"
+  | LessThanEquals -> "LessThanEquals"
+  | GreaterThan -> "GreaterThan"
+  | GreaterThanEquals -> "GreaterThanEquals"
+  | And -> "And"
+  | Or -> "Or"
\ No newline at end of file
diff --git a/test/ressources/test.🥐 b/test/ressources/test.🥐
index c63591a..d9a2b18 100644
--- a/test/ressources/test.🥐
+++ b/test/ressources/test.🥐
@@ -1 +1 @@
-'a';
\ No newline at end of file
+!vrai;
\ No newline at end of file
diff --git a/test/syntax/TestBinaryOperators.ml b/test/syntax/TestBinaryOperators.ml
index 1346bc0..a31fd1d 100644
--- a/test/syntax/TestBinaryOperators.ml
+++ b/test/syntax/TestBinaryOperators.ml
@@ -8,6 +8,16 @@ let test_pp_binary_operators () =
       ("Should return \"Subtract\"", "Subtract", Subtract);
       ("Should return \"Multiply\"", "Multiply", Multiply);
       ("Should return \"Divide\"", "Divide", Divide);
+      ("Should return \"Equals\"", "Equals", Equals);
+      ("Should return \"NotEquals\"", "NotEquals", NotEquals);
+      ("Should return \"LessThan\"", "LessThan", LessThan);
+      ("Should return \"LessThanEquals\"", "LessThanEquals", LessThanEquals);
+      ("Should return \"GreaterThan\"", "GreaterThan", GreaterThan);
+      ( "Should return \"GreaterThanEquals\"",
+        "GreaterThanEquals",
+        GreaterThanEquals );
+      ("Should return \"And\"", "And", And);
+      ("Should return \"Or\"", "Or", Or);
     ]
   in
   List.iter