diff --git a/db/builder_db.ml b/db/builder_db.ml
index ae5702e..9ef714f 100644
--- a/db/builder_db.ml
+++ b/db/builder_db.ml
@@ -12,7 +12,7 @@ type file = Rep.file = {
   filepath : Fpath.t;
   localpath : Fpath.t;
   sha256 : Cstruct.t;
-  size : int64;
+  size : int;
 }
 
 let last_insert_rowid =
diff --git a/db/builder_db.mli b/db/builder_db.mli
index 73506d0..f70485a 100644
--- a/db/builder_db.mli
+++ b/db/builder_db.mli
@@ -4,7 +4,7 @@ type file = {
   filepath : Fpath.t;
   localpath : Fpath.t;
   sha256 : Cstruct.t;
-  size : int64;
+  size : int;
 }
 
 val application_id : int32
diff --git a/db/representation.ml b/db/representation.ml
index 0f22beb..dc7378d 100644
--- a/db/representation.ml
+++ b/db/representation.ml
@@ -27,7 +27,7 @@ type file = {
   filepath : Fpath.t;
   localpath : Fpath.t;
   sha256 : Cstruct.t;
-  size : int64;
+  size : int;
 }
 
 let uuid =
@@ -62,10 +62,10 @@ let file =
     Ok (filepath, localpath, sha256, size) in
   let decode (filepath, localpath, sha256, size) =
     Ok { filepath; localpath; sha256; size } in
-  Caqti_type.custom ~encode ~decode Caqti_type.(tup4 fpath fpath cstruct int64)
+  Caqti_type.custom ~encode ~decode Caqti_type.(tup4 fpath fpath cstruct int)
 
 let file_opt =
-  let rep = Caqti_type.(tup4 (option fpath) (option fpath) (option cstruct) (option int64)) in
+  let rep = Caqti_type.(tup4 (option fpath) (option fpath) (option cstruct) (option int)) in
   let encode = function
     | Some { filepath; localpath; sha256; size } ->
       Ok (Some filepath, Some localpath, Some sha256, Some size)
diff --git a/lib/model.ml b/lib/model.ml
index 0f080f0..77e2966 100644
--- a/lib/model.ml
+++ b/lib/model.ml
@@ -92,7 +92,7 @@ let save_exec build_dir exec =
   save Fpath.(build_dir / "full") (Cstruct.to_string cs)
 
 let save_file dir (filepath, data) =
-  let size = String.length data |> Int64.of_int in
+  let size = String.length data in
   let sha256 = Mirage_crypto.Hash.SHA256.digest (Cstruct.of_string data) in
   let localpath = Fpath.append dir filepath in
   Lwt_result.lift (Bos.OS.Dir.create (Fpath.parent localpath)) >>= fun _ ->
diff --git a/lib/views.ml b/lib/views.ml
index e18ec4b..3db5866 100644
--- a/lib/views.ml
+++ b/lib/views.ml
@@ -86,7 +86,7 @@ let artifact ?(basename=false) job_name build { Builder_db.filepath; localpath =
       [if basename
        then txt (Fpath.basename filepath)
        else txtf "%a" Fpath.pp filepath];
-    txtf " (%a) " Fmt.byte_size (Int64.to_int size);
+    txtf " (%a) " Fmt.byte_size size;
     code [txtf "SHA256:%a" Hex.pp (Hex.of_cstruct sha256)];
   ]
 
@@ -184,7 +184,7 @@ let job_build
                        [code [txtf "%a" Fpath.pp filepath]]];
                  dd [
                    code [txt "SHA256:"; txt sha256_hex];
-                   txtf " (%a)" Fmt.byte_size (Int64.to_int size);
+                   txtf " (%a)" Fmt.byte_size size;
                  ];
                ])
             artifacts);