diff --git a/src/lib.rs b/src/lib.rs
index 7d1e253..3f46a7f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -202,6 +202,20 @@ impl<'a> BinaryReader<'a> {
         decode!(self.endian, buffer, usize);
     }
 
+    /// Read a `u128` from the stream.
+    pub fn read_u128(&mut self) -> Result<u128> {
+        let mut buffer: [u8; 16] = [0; 16];
+        self.stream.read_exact(&mut buffer)?;
+        decode!(self.endian, buffer, u128);
+    }
+
+    /// Read an `i128` from the stream.
+    pub fn read_i128(&mut self) -> Result<i128> {
+        let mut buffer: [u8; 16] = [0; 16];
+        self.stream.read_exact(&mut buffer)?;
+        decode!(self.endian, buffer, i128);
+    }
+
     /// Read a `u64` from the stream.
     pub fn read_u64(&mut self) -> Result<u64> {
         let mut buffer: [u8; 8] = [0; 8];
@@ -258,15 +272,15 @@ impl<'a> BinaryReader<'a> {
         decode!(self.endian, buffer, i8);
     }
 
-    /// Read 7bit encoded `i32` from the stream
-    pub fn read_7bit_encoded_i32(&mut self) -> Result<i32> {
-        let mut result: i32 = 0;
-        let mut shift: u32 = 0;
+    /// Read 7bit encoded `usize` from the stream
+    pub fn read_7bit_encoded_usize(&mut self) -> Result<usize> {
+        let mut result: usize = 0;
+        let mut shift: usize = 0;
 
         loop {
             let byte = self.read_u8()?;
 
-            result |= (byte as i32 & 0x7F) << shift;
+            result |= (byte as usize & 0x7F) << shift;
             shift += 7;
 
             if byte & 0x80 == 0 {
@@ -276,15 +290,87 @@ impl<'a> BinaryReader<'a> {
         Ok(result)
     }
 
-    /// Read 7bit encoded `usize` from the stream
-    pub fn read_7bit_encoded_usize(&mut self) -> Result<usize> {
-        let mut result: usize = 0;
+    /// Read 7bit encoded `i64` from the stream
+    pub fn read_7bit_encoded_i64(&mut self) -> Result<i64> {
+        let mut result: i64 = 0;
+        let mut shift: u64 = 0;
+
+        loop {
+            let byte = self.read_u8()?;
+
+            result |= (byte as i64 & 0x7F) << shift;
+            shift += 7;
+
+            if byte & 0x80 == 0 {
+                break;
+            }
+        }
+        Ok(result)
+    }
+
+    /// Read 7bit encoded `u128` from the stream
+    pub fn read_7bit_encoded_u128(&mut self) -> Result<u128> {
+        let mut result: u128 = 0;
         let mut shift: usize = 0;
 
         loop {
             let byte = self.read_u8()?;
 
-            result |= (byte as usize & 0x7F) << shift;
+            result |= (byte as u128 & 0x7F) << shift;
+            shift += 7;
+
+            if byte & 0x80 == 0 {
+                break;
+            }
+        }
+        Ok(result)
+    }
+
+    /// Read 7bit encoded `i128` from the stream
+    pub fn read_7bit_encoded_i128(&mut self) -> Result<i128> {
+        let mut result: i128 = 0;
+        let mut shift: usize = 0;
+
+        loop {
+            let byte = self.read_u8()?;
+
+            result |= (byte as i128 & 0x7F) << shift;
+            shift += 7;
+
+            if byte & 0x80 == 0 {
+                break;
+            }
+        }
+        Ok(result)
+    }
+
+    /// Read 7bit encoded `u64` from the stream
+    pub fn read_7bit_encoded_u64(&mut self) -> Result<u64> {
+        let mut result: u64 = 0;
+        let mut shift: usize = 0;
+
+        loop {
+            let byte = self.read_u8()?;
+
+            result |= (byte as u64 & 0x7F) << shift;
+            shift += 7;
+
+            if byte & 0x80 == 0 {
+                break;
+            }
+        }
+        Ok(result)
+    }
+
+    /// Read 7bit encoded `i32` from the stream
+    pub fn read_7bit_encoded_i32(&mut self) -> Result<i32> {
+        let mut result: i32 = 0;
+        let mut shift: usize = 0;
+
+        loop {
+            let byte = self.read_u8()?;
+
+            result |= (byte as i32 & 0x7F) << shift;
             shift += 7;
 
             if byte & 0x80 == 0 {
@@ -412,11 +498,21 @@ impl<'a> BinaryWriter<'a> {
         encode!(self.endian, value.borrow(), self.stream);
     }
 
+    /// Write a `u128` to the stream.
+    pub fn write_u128<V: Borrow<u128>>(&mut self, value: V) -> Result<usize> {
+        encode!(self.endian, value.borrow(), self.stream);
+    }
+
     /// Write an `i64` to the stream.
     pub fn write_i64<V: Borrow<i64>>(&mut self, value: V) -> Result<usize> {
         encode!(self.endian, value.borrow(), self.stream);
     }
 
+    /// Write a `i128` to the stream.
+    pub fn write_i128<V: Borrow<i128>>(&mut self, value: V) -> Result<usize> {
+        encode!(self.endian, value.borrow(), self.stream);
+    }
+
     /// Write a `u32` to the stream.
     pub fn write_u32<V: Borrow<u32>>(&mut self, value: V) -> Result<usize> {
         encode!(self.endian, value.borrow(), self.stream);
@@ -478,6 +574,44 @@ impl<'a> BinaryWriter<'a> {
         Ok(length + 1)
     }
 
+    /// Write 7bit encoded i64 to the stream
+    pub fn write_7bit_encoded_i64(&mut self, value: i64) -> Result<usize> {
+        self.write_7bit_encoded_u64(value as u64)
+    }
+
+    /// Write 7bit encoded u64 to the stream
+    pub fn write_7bit_encoded_u64(&mut self, value: u64) -> Result<usize> {
+        let mut v = value; // support negative numbers
+        let mut length: usize = 0;
+        while v >= 0x80 {
+            length += 1;
+            self.write_u8((v | 0x80) as u8)?;
+            v >>= 7;
+        }
+        self.write_u8(v as u8)?;
+
+        Ok(length + 1)
+    }
+
+    /// Write 7bit encoded i128 to the stream
+    pub fn write_7bit_encoded_i128(&mut self, value: i128) -> Result<usize> {
+        self.write_7bit_encoded_u128(value as u128)
+    }
+
+    /// Write 7bit encoded u128 to the stream
+    pub fn write_7bit_encoded_u128(&mut self, value: u128) -> Result<usize> {
+        let mut v = value; // support negative numbers
+        let mut length: usize = 0;
+        while v >= 0x80 {
+            length += 1;
+            self.write_u8((v | 0x80) as u8)?;
+            v >>= 7;
+        }
+        self.write_u8(v as u8)?;
+
+        Ok(length + 1)
+    }
+
     /// Write 7bit encoded usize to the stream
     pub fn write_7bit_encoded_usize(&mut self, value: usize) -> Result<usize> {
         let mut v = value; // support negative numbers
diff --git a/tests/lib.rs b/tests/lib.rs
index 9f9be91..8ffcd90 100644
--- a/tests/lib.rs
+++ b/tests/lib.rs
@@ -42,6 +42,11 @@ fn borrow_test() -> Result<()> {
     writer.write_i64(-64)?;
     writer.write_i64(&-64)?;
 
+    writer.write_u128(128)?;
+    writer.write_u128(&128)?;
+    writer.write_i128(-128)?;
+    writer.write_i128(&-128)?;
+
     writer.write_usize(64)?;
     writer.write_usize(&64)?;
     writer.write_isize(-64)?;
@@ -87,6 +92,11 @@ fn borrow_test() -> Result<()> {
     let value = (reader.read_i64()?, reader.read_i64()?);
     assert_eq!((-64, -64), value);
 
+    let value = (reader.read_u128()?, reader.read_u128()?);
+    assert_eq!((128, 128), value);
+    let value = (reader.read_i128()?, reader.read_i128()?);
+    assert_eq!((-128, -128), value);
+
     let value = (reader.read_usize()?, reader.read_usize()?);
     assert_eq!((64, 64), value);
     let value = (reader.read_isize()?, reader.read_isize()?);
@@ -253,6 +263,46 @@ fn read_write_test_usize() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn read_write_test_i128() -> Result<()> {
+    let temp: i128 = 1 << 127;
+    let mut stream = create_writer_stream("i128");
+    let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+    writer.write_i128(temp)?;
+
+    let mut stream = create_reader_stream("i128");
+    let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+    let read_temp = reader.read_i128()?;
+
+    assert_eq!(temp, read_temp);
+
+    cleanup("i128");
+
+    Ok(())
+}
+
+#[test]
+fn read_write_test_u128() -> Result<()> {
+    let temp: u128 = 1 << 127;
+    let mut stream = create_writer_stream("u128");
+    let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+    writer.write_u128(temp)?;
+
+    let mut stream = create_reader_stream("u128");
+    let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+    let read_temp = reader.read_u128()?;
+
+    assert_eq!(temp, read_temp);
+
+    cleanup("u128");
+
+    Ok(())
+}
+
 #[test]
 fn read_write_test_i64() -> Result<()> {
     let temp: i64 = 50;
@@ -412,6 +462,99 @@ fn read_write_test_u8() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn read_write_test_7bit_encoded_u128() -> Result<()> {
+    let values: [(u128, usize); 6] = [(50, 1), (270, 2), (70000, 3), (2147483647, 5), (1 << 63, 10), (1 << 127, 19)];
+
+    for (temp, size_expected) in values {
+        let mut stream = create_writer_stream("7bit_encoded_u128");
+        let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+        let size = writer.write_7bit_encoded_u128(temp)?;
+        assert_eq!(size_expected, size);
+
+        let mut stream = create_reader_stream("7bit_encoded_u128");
+        let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+        let read_temp = reader.read_7bit_encoded_u128()?;
+
+        assert_eq!(temp, read_temp);
+
+        cleanup("7bit_encoded_u128");
+    }
+    Ok(())
+}
+
+
+#[test]
+fn read_write_test_7bit_encoded_i128() -> Result<()> {
+    let values: [(i128, usize); 8] = [(-2147483647, 19), (-100, 19), (50, 1), (270, 2), (70000, 3), (2147483647, 5), (1 << 63, 10), (1 << 127, 19)];
+    for (temp, size_expected) in values {
+
+        let mut stream = create_writer_stream("7bit_encoded_i128");
+        let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+        let size = writer.write_7bit_encoded_i128(temp)?;
+        assert_eq!(size_expected, size);
+
+        let mut stream = create_reader_stream("7bit_encoded_i128");
+        let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+        let read_temp = reader.read_7bit_encoded_i128()?;
+
+        assert_eq!(temp, read_temp);
+
+        cleanup("7bit_encoded_i128");
+    }
+    Ok(())
+}
+
+#[test]
+fn read_write_test_7bit_encoded_u64() -> Result<()> {
+    let values: [(u64, usize); 5] = [(50, 1), (270, 2), (70000, 3), (2147483647, 5), (1 << 63, 10)];
+
+    for (temp, size_expected) in values {
+        let mut stream = create_writer_stream("7bit_encoded_u64");
+        let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+        let size = writer.write_7bit_encoded_u64(temp)?;
+        assert_eq!(size_expected, size);
+
+        let mut stream = create_reader_stream("7bit_encoded_u64");
+        let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+        let read_temp = reader.read_7bit_encoded_u64()?;
+
+        assert_eq!(temp, read_temp);
+
+        cleanup("7bit_encoded_u64");
+    }
+    Ok(())
+}
+
+#[test]
+fn read_write_test_7bit_encoded_i64() -> Result<()> {
+    let values: [(i64, usize); 7] = [(-2147483647, 10), (-100, 10), (50, 1), (270, 2), (70000, 3), (2147483647, 5), (1 << 63, 10)];
+
+    for (temp, size_expected) in values {
+        let mut stream = create_writer_stream("7bit_encoded_i64");
+        let mut writer = BinaryWriter::new(&mut stream, Default::default());
+
+        let size = writer.write_7bit_encoded_i64(temp)?;
+        assert_eq!(size_expected, size);
+
+        let mut stream = create_reader_stream("7bit_encoded_i64");
+        let mut reader = BinaryReader::new(&mut stream, Default::default());
+
+        let read_temp = reader.read_7bit_encoded_i64()?;
+
+        assert_eq!(temp, read_temp);
+
+        cleanup("7bit_encoded_i64");
+    }
+    Ok(())
+}
+
 #[test]
 fn read_write_test_7bit_encoded_i32() -> Result<()> {
     let values: [(i32, usize); 6] = [(-2147483647, 5), (-100, 5), (50, 1), (270, 2), (70000, 3), (2147483647, 5)];