diff --git a/fsb/src/lib.rs b/fsb/src/lib.rs
index 141468fd..8bf52722 100644
--- a/fsb/src/lib.rs
+++ b/fsb/src/lib.rs
@@ -12,7 +12,7 @@
 #[macro_use]
 mod macros;
 
-use core::fmt;
+use core::{fmt, ops::Add};
 pub use digest::{self, Digest};
 
 // Double check this contains all values in the reference implementation
@@ -24,7 +24,8 @@ use digest::{
         AlgorithmName, Block, BlockSizeUser, Buffer, BufferKindUser, CoreWrapper, FixedOutputCore,
         OutputSizeUser, Reset, UpdateCore,
     },
-    typenum::Unsigned,
+    crypto_common::hazmat::{DeserializeStateError, SerializableState, SerializedState},
+    typenum::{Unsigned, U8},
     HashMarker, Output,
 };
 
@@ -38,6 +39,7 @@ fsb_impl!(
     160,
     U60,
     U20,
+    U80,
     5 << 18,
     80,
     640,
@@ -54,6 +56,7 @@ fsb_impl!(
     224,
     U84,
     U28,
+    U112,
     7 << 18,
     112,
     896,
@@ -70,6 +73,7 @@ fsb_impl!(
     256,
     U96,
     U32,
+    U128,
     1 << 21,
     128,
     1024,
@@ -86,6 +90,7 @@ fsb_impl!(
     384,
     U115,
     U48,
+    U184,
     23 << 16,
     184,
     1472,
@@ -102,6 +107,7 @@ fsb_impl!(
     512,
     U155,
     U64,
+    U248,
     31 << 16,
     248,
     1984,
diff --git a/fsb/src/macros.rs b/fsb/src/macros.rs
index 2204b747..5b4a189c 100644
--- a/fsb/src/macros.rs
+++ b/fsb/src/macros.rs
@@ -1,9 +1,9 @@
 macro_rules! fsb_impl {
     (
-        $full_state:ident, $state:ident, $state_num:expr, $blocksize:ident, $outputsize:ident, $n:expr, $w:expr,
-        $r:expr, $p:expr, $s:expr, $full_doc:expr, $doc:expr,
+        $full_state:ident, $state:ident, $state_num:expr, $blocksize:ident, $outputsize:ident, $statesize:ident,
+        $n:expr, $w:expr, $r:expr, $p:expr, $s:expr, $full_doc:expr, $doc:expr,
     ) => {
-        use digest::consts::{$blocksize, $outputsize};
+        use digest::consts::{$blocksize, $outputsize, $statesize};
 
         #[derive(Clone)]
         #[doc=$doc]
@@ -95,6 +95,31 @@ macro_rules! fsb_impl {
         #[cfg(feature = "zeroize")]
         impl ZeroizeOnDrop for $state {}
 
+        impl SerializableState for $state {
+            type SerializedStateSize = <$statesize as Add<U8>>::Output;
+
+            fn serialize(&self) -> SerializedState<Self> {
+                let mut serialized_state = SerializedState::<Self>::default();
+
+                serialized_state[..8].copy_from_slice(&self.blocks_len.to_le_bytes());
+                serialized_state[8..].copy_from_slice(&self.state[..]);
+
+                serialized_state
+            }
+
+            fn deserialize(
+                serialized_state: &SerializedState<Self>,
+            ) -> Result<Self, DeserializeStateError> {
+                let (serialized_block_len, serialized_state) = serialized_state.split::<U8>();
+
+                let mut state = [0; $r / 8];
+                state.copy_from_slice(serialized_state.as_ref());
+
+                let blocks_len = u64::from_le_bytes(*serialized_block_len.as_ref());
+                Ok(Self { state, blocks_len })
+            }
+        }
+
         impl $state {
             const SIZE_OUTPUT_COMPRESS: usize = $r / 8;
             const SIZE_INPUT_COMPRESS: usize = $s / 8;
diff --git a/fsb/tests/mod.rs b/fsb/tests/mod.rs
index 6a9bddea..e2d9b780 100644
--- a/fsb/tests/mod.rs
+++ b/fsb/tests/mod.rs
@@ -1,5 +1,7 @@
-use digest::dev::{feed_rand_16mib, fixed_reset_test};
-use digest::new_test;
+use digest::{
+    dev::{feed_rand_16mib, fixed_reset_test},
+    hash_serialization_test, new_test,
+};
 use fsb::{Digest, Fsb160, Fsb224, Fsb256, Fsb384, Fsb512};
 use hex_literal::hex;
 
@@ -9,6 +11,129 @@ new_test!(fsb256_main, "fsb256", Fsb256, fixed_reset_test);
 new_test!(fsb384_main, "fsb384", Fsb384, fixed_reset_test);
 new_test!(fsb512_main, "fsb512", Fsb512, fixed_reset_test);
 
+#[rustfmt::skip]
+hash_serialization_test!(
+    fsb160_serialization,
+    Fsb160,
+    hex!("
+        0100000000000000e269a086505e9493
+        fa92ed509f6cdce851dd58654160a8c8
+        a499a953a479c169d46c0576d8e7b262
+        341087f58eb3dc9d3002451f8f0d484c
+        bdc8b342afef13e54f2fce12e400eca0
+        a6bc0b8837f999c30113000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        0000000000
+    ")
+);
+#[rustfmt::skip]
+hash_serialization_test!(
+    fsb224_serialization,
+    Fsb224,
+    hex!("
+        0100000000000000bfba3bbd79050b44
+        28d239ec4eb25277b228898bd26c04cc
+        f11e052944e72b61aae3f1a0a6cdb862
+        d87fac21fefb1dc14074cfc45d899408
+        7dc70d1d5308b6b1f68f6eea5d886904
+        dfcab198e62f6c9767ae365fc648b1bb
+        7d00f65ff276373a7a1b4d80efdd7af5
+        fce3b0e93371172a0113000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000
+    ")
+);
+
+#[rustfmt::skip]
+hash_serialization_test!(
+    fsb256_serialization,
+    Fsb256,
+    hex!("
+        01000000000000006c4fef5401baa182
+        5e74fe2a150dd74655ba10d8fa2db4ee
+        3e6925de2cf4a83a5121e2ded528f926
+        13ec858045c1bdd15a11ce8bd4df1a3f
+        409dfc9d1025d333360f30a342f41701
+        8fcf0ff1c5dddb042a18453d707d2772
+        1e57fd182d93294589a1c3ef007e6bb3
+        b59f2a361094e21d6c72d213545a6612
+        a2adc547968a03e90113000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        000000000000000000
+    ")
+);
+
+#[rustfmt::skip]
+hash_serialization_test!(
+    fsb384_serialization,
+    Fsb384,
+    hex!("
+        010000000000000041825b73ae6b5cdc
+        91b8b70723dc1f9297fec62f09c17c75
+        a2326e3d7664efb5df1104db5c711016
+        d161187f3174ef77f5e0545c917d0137
+        5537d15cf90c838d2f5fd5a294c7012d
+        80a0f6a6240f90f9a6976812ec60fdd3
+        5bbc1a064287308e1d916cb4d59c02b1
+        9ab2d20e1b9b2acbe826c4d0022db322
+        e3314fe0cf232cdd75b61c653bf30569
+        ca76dd11bd032d03bc83a0e59964eb5d
+        d77a22d0a459de63ab5ff6ce1207a9da
+        ed690c36399f730643a1628e0f33650a
+        01130000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000
+    ")
+);
+
+#[rustfmt::skip]
+hash_serialization_test!(
+    fsb512_serialization,
+    Fsb512,
+    hex!("
+        01000000000000004feff733b532b076
+        7d0bbe8804f60ebcbbf33aa6796e608d
+        37e6e24dcf21663631312286c6efa794
+        b237f05df2838526cb5120291a53566b
+        b784ff32d2ea5464693cd68fc52a3737
+        5160c0a4f4b8dae806703a98720180c4
+        abaa2c195a6ede59ed68fc5caae61720
+        03ad9195d7ae774710d7a0c46772a721
+        6e553a39dbeac282fa2848e7038eec7c
+        78f7da35db4cf8ead35f2f140ec49203
+        f1d3afe24fe4100a9d0cc5fdb1e964ed
+        48fe786e2bfdabe470c148f65c67c21c
+        c6794b8e1eb90e6a39800334a2016e20
+        81f5a458fcd348d8778dc4090066f390
+        6b835a1283c975694e1dc38fef18dd35
+        d2d4f283d0bc1502db72a91871a23bc4
+        01130000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        00000000000000000000000000000000
+        000000000000000000000000
+    ")
+);
+
 #[test]
 fn fsb160_rand() {
     let mut h = Fsb160::new();