diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.13
+
+* *SECURITY* Fix buffer overflow issue in SHA384, copying 16 extra bytes from
+  the SHA512 context to the destination memory pointer leading to memory
+  corruption, segfault. (Mikael Bung)
+
 ## 0.12
 
 * Fix compilation issue with Ed448 on 32 bits machine.
diff --git a/cbits/cryptonite_sha512.h b/cbits/cryptonite_sha512.h
--- a/cbits/cryptonite_sha512.h
+++ b/cbits/cryptonite_sha512.h
@@ -35,7 +35,7 @@
 
 #define sha384_ctx sha512_ctx
 
-#define SHA384_DIGEST_SIZE	64
+#define SHA384_DIGEST_SIZE	48
 #define SHA384_CTX_SIZE		sizeof(struct sha384_ctx)
 
 #define SHA512_DIGEST_SIZE	64
diff --git a/cryptonite.cabal b/cryptonite.cabal
--- a/cryptonite.cabal
+++ b/cryptonite.cabal
@@ -1,5 +1,5 @@
 Name:                cryptonite
-Version:             0.12
+Version:             0.13
 Synopsis:            Cryptography Primitives sink
 Description:
     A repository of cryptographic primitives.