diff --git a/src/hash.ml b/src/hash.ml
index 5c91cdc5..0fbdd01a 100644
--- a/src/hash.ml
+++ b/src/hash.ml
@@ -6,17 +6,19 @@
 (* C-terminated strings
    some strings need to be hashed with a '\0' termination char *)
 
-module Hash_32 = struct
-  type t = Digestif.SHA256.t
+open Digestif
 
-  let hash s = Digestif.SHA256.(digest_string s)
+module Hash_32 = struct
+  type t = SHA256.t
+
+  let hash s = SHA256.(digest_string s)
 
   let of_octets s =
     match String.length s = 32 with
     | false -> Fmt.failwith "Hash.of_octets failure: data is not 32 bytes"
-    | true -> Digestif.SHA256.of_raw_string s
+    | true -> SHA256.of_raw_string s
 
-  let to_octets = Digestif.SHA256.to_raw_string
+  let to_octets = SHA256.to_raw_string
   let of_b32 s = Result.map of_octets (B32.decode s)
 
   let bin =
@@ -37,17 +39,17 @@ module Hash_32 = struct
 end
 
 module Hash_64 = struct
-  type t = Digestif.SHA512.t
+  type t = SHA512.t
 
-  let hash s = Digestif.SHA512.(digest_string s)
+  let hash s = SHA512.(digest_string s)
 
   let of_octets s =
     match String.length s = 64 with
     | false -> Fmt.failwith "Hash.of_octets failure: data is not 64 bytes"
-    | true -> Digestif.SHA512.of_raw_string s
+    | true -> SHA512.of_raw_string s
 
   let to_octets v =
-    let s = Digestif.SHA512.to_raw_string v in
+    let s = SHA512.to_raw_string v in
     match String.length s = 64 with
     | false -> Fmt.failwith "Hash.to_octets failure: data is not 64 bytes"
     | true -> s
@@ -77,7 +79,7 @@ module Hash_32_cstr = struct
 
   let hash s =
     let s = s ^ "\x00" in
-    Digestif.SHA256.(digest_string s)
+    SHA256.(digest_string s)
 end
 
 module Hash_64_cstr = struct
@@ -85,7 +87,7 @@ module Hash_64_cstr = struct
 
   let hash s =
     let s = s ^ "\x00" in
-    Digestif.SHA512.(digest_string s)
+    SHA512.(digest_string s)
 end
 
 module type Hash_S = sig