diff --git a/ext/quickjsrb/quickjsrb.c b/ext/quickjsrb/quickjsrb.c
index 7bdaff0..7953450 100644
--- a/ext/quickjsrb/quickjsrb.c
+++ b/ext/quickjsrb/quickjsrb.c
@@ -49,7 +49,6 @@ VALUE rb_module_eval_js_code(
   JSValue res = JS_Eval(ctx, code, strlen(code), "<code>", JS_EVAL_TYPE_GLOBAL);
 
   VALUE result;
-  int r = 0;
   if (JS_IsException(res)) {
     rb_raise(rb_eRuntimeError, "Something happened by evaluating as JavaScript code");
     result = Qnil;
@@ -71,8 +70,16 @@ VALUE rb_module_eval_js_code(
   } else if (JS_VALUE_IS_NAN(res)) {
     result = ID2SYM(rb_intern(nanId));
   } else if (JS_IsNumber(res)) {
-    JS_ToInt32(ctx, &r, res);
-    result = INT2NUM(r);
+    int tag = JS_VALUE_GET_TAG(res);
+    if (JS_TAG_IS_FLOAT64(tag)) {
+      double double_res;
+      JS_ToFloat64(ctx, &double_res, res);
+      result = DBL2NUM(double_res);
+    } else {
+      int int_res;
+      JS_ToInt32(ctx, &int_res, res);
+      result = INT2NUM(int_res);
+    }
   } else if (JS_IsString(res)) {
     JSValue maybeString = JS_ToString(ctx, res);
     const char *msg = JS_ToCString(ctx, maybeString);
diff --git a/test/quickjs_test.rb b/test/quickjs_test.rb
index e643f99..d265208 100644
--- a/test/quickjs_test.rb
+++ b/test/quickjs_test.rb
@@ -38,6 +38,11 @@ class QuickjsTest < Test::Unit::TestCase
     assert_equal(::Quickjs.evalCode("const func = () => 8; func();"), 8)
   end
 
+  test "support returning float" do
+    assert_equal(::Quickjs.evalCode("1.0"), 1.0)
+    assert_equal(::Quickjs.evalCode("2 ** 0.5"), 1.4142135623730951)
+  end
+
   test "support returning boolean" do
     assert_equal(::Quickjs.evalCode("false"), false)
     assert_equal(::Quickjs.evalCode("true"), true)