diff --git a/tests/token.odin b/tests/token.odin
index b8fa11d..8b8d645 100644
--- a/tests/token.odin
+++ b/tests/token.odin
@@ -88,6 +88,60 @@ plus_token :: proc(t: ^testing.T) {
 	testing.expect_value(t, tokens[0], token.Token{type = .Plus})
 }
 
+@(test)
+minus_token :: proc(t: ^testing.T) {
+	tokens := token.lex("-", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .Minus})
+}
+
+@(test)
+bang_token :: proc(t: ^testing.T) {
+	tokens := token.lex("!", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .Bang})
+}
+
+@(test)
+asterisk_token :: proc(t: ^testing.T) {
+	tokens := token.lex("*", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .Asterisk})
+}
+
+@(test)
+slash_token :: proc(t: ^testing.T) {
+	tokens := token.lex("/", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .Slash})
+}
+
+@(test)
+less_than_token :: proc(t: ^testing.T) {
+	tokens := token.lex("<", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .LessThan})
+}
+
+@(test)
+greater_than_token :: proc(t: ^testing.T) {
+	tokens := token.lex(">", context.allocator)
+	defer free_all(context.allocator)
+
+	testing.expect_value(t, len(tokens), 1)
+	testing.expect_value(t, tokens[0], token.Token{type = .GreaterThan})
+}
+
 @(test)
 left_parenthesis_token :: proc(t: ^testing.T) {
 	tokens := token.lex("(", context.allocator)
diff --git a/token/lexer.odin b/token/lexer.odin
index fb67694..5376eec 100644
--- a/token/lexer.odin
+++ b/token/lexer.odin
@@ -94,6 +94,18 @@ next :: proc(l: ^Lexer, allocator := context.allocator) -> (token: Token, ok: bo
 	case '+':
 		token.type = .Plus
 		ok = true
+	case '-':
+		token.type = .Minus
+		ok = true
+	case '!':
+		token.type = .Bang
+		ok = true
+	case '*':
+		token.type = .Asterisk
+		ok = true
+	case '/':
+		token.type = .Slash
+		ok = true
 	case '(':
 		token.type = .LeftParenthesis
 		ok = true
@@ -106,6 +118,12 @@ next :: proc(l: ^Lexer, allocator := context.allocator) -> (token: Token, ok: bo
 	case '}':
 		token.type = .RightBrace
 		ok = true
+	case '<':
+		token.type = .LessThan
+		ok = true
+	case '>':
+		token.type = .GreaterThan
+		ok = true
 	case ',':
 		token.type = .Comma
 		ok = true
diff --git a/token/token.odin b/token/token.odin
index 5750ca2..eb44adc 100644
--- a/token/token.odin
+++ b/token/token.odin
@@ -6,8 +6,14 @@ Type :: enum {
 	Assignment,
 	Integer,
 	Plus,
+	Minus,
+	Bang,
+	Asterisk,
+	Slash,
 	Comma,
 	Semicolon,
+	LessThan,
+	GreaterThan,
 	LeftParenthesis,
 	RightParenthesis,
 	LeftBrace,