diff --git a/decode_test.go b/decode_test.go
index a3cb746..209c658 100644
--- a/decode_test.go
+++ b/decode_test.go
@@ -1317,6 +1317,12 @@ var unmarshalTests = []unmarshalTest{
 		ptr: new(string),
 		out: "hello\ufffd\ufffd\ufffd\ufffd\ufffd\ufffdworld",
 	},
+	{in: "-128", ptr: new(int8), out: int8(-128)},
+	{in: "127", ptr: new(int8), out: int8(127)},
+	{in: "-32768", ptr: new(int16), out: int16(-32768)},
+	{in: "32767", ptr: new(int16), out: int16(32767)},
+	{in: "-2147483648", ptr: new(int32), out: int32(-2147483648)},
+	{in: "2147483647", ptr: new(int32), out: int32(2147483647)},
 }
 
 type All struct {
diff --git a/internal/decoder/int.go b/internal/decoder/int.go
index 7edfb04..509b753 100644
--- a/internal/decoder/int.go
+++ b/internal/decoder/int.go
@@ -192,15 +192,15 @@ func (d *intDecoder) DecodeStream(s *Stream, depth int64, p unsafe.Pointer) erro
 	}
 	switch d.kind {
 	case reflect.Int8:
-		if i64 <= -1*(1<<7) || (1<<7) <= i64 {
+		if i64 < -1*(1<<7) || (1<<7) <= i64 {
 			return d.typeError(bytes, s.totalOffset())
 		}
 	case reflect.Int16:
-		if i64 <= -1*(1<<15) || (1<<15) <= i64 {
+		if i64 < -1*(1<<15) || (1<<15) <= i64 {
 			return d.typeError(bytes, s.totalOffset())
 		}
 	case reflect.Int32:
-		if i64 <= -1*(1<<31) || (1<<31) <= i64 {
+		if i64 < -1*(1<<31) || (1<<31) <= i64 {
 			return d.typeError(bytes, s.totalOffset())
 		}
 	}
@@ -225,15 +225,15 @@ func (d *intDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsafe.P
 	}
 	switch d.kind {
 	case reflect.Int8:
-		if i64 <= -1*(1<<7) || (1<<7) <= i64 {
+		if i64 < -1*(1<<7) || (1<<7) <= i64 {
 			return 0, d.typeError(bytes, cursor)
 		}
 	case reflect.Int16:
-		if i64 <= -1*(1<<15) || (1<<15) <= i64 {
+		if i64 < -1*(1<<15) || (1<<15) <= i64 {
 			return 0, d.typeError(bytes, cursor)
 		}
 	case reflect.Int32:
-		if i64 <= -1*(1<<31) || (1<<31) <= i64 {
+		if i64 < -1*(1<<31) || (1<<31) <= i64 {
 			return 0, d.typeError(bytes, cursor)
 		}
 	}