diff --git a/catala.opam b/catala.opam
index 4650932f..ac9ac008 100644
--- a/catala.opam
+++ b/catala.opam
@@ -22,7 +22,7 @@ depends: [
   "bindlib" {>= "6.0"}
   "cmdliner" {>= "1.1.0"}
   "cppo" {>= "1"}
-  "dates_calc" {>= "0.0.4"}
+  "dates_calc" {>= "0.0.6"}
   "dune" {>= "3.11"}
   "js_of_ocaml-ppx" {= "4.1.0"}
   "menhir" {>= "20200211"}
@@ -31,7 +31,7 @@ depends: [
   "ocamlfind" {!= "1.9.5"}
   "ocamlgraph" {>= "1.8.8"}
   "re" {>= "1.10"}
-  "sedlex" {>= "2.4"}
+  "sedlex" {>= "3.1"}
   "uutf" {>= "1.0.3"}
   "ubase" {>= "0.05"}
   "unionFind" {>= "20220109"}
diff --git a/compiler/surface/lexer.cppo.ml b/compiler/surface/lexer.cppo.ml
index 9e0ac90a..d325c6fb 100644
--- a/compiler/surface/lexer.cppo.ml
+++ b/compiler/surface/lexer.cppo.ml
@@ -778,9 +778,6 @@ let lex_raw (lexbuf : lexbuf) : token =
     | _ -> (
         (* Nested match for lower priority; `_` matches length 0 so we effectively retry the
            sub-match at the same point *)
-        let lexbuf = lexbuf in
-        (* workaround sedlex bug, see https://github.com/ocaml-community/sedlex/issues/12
-           (fixed in 3.1) *)
         match%sedlex lexbuf with
         | Star (Compl '\n'), ('\n' | eof) -> LAW_TEXT (Utf8.lexeme lexbuf)
         | _ -> L.raise_lexer_error (Pos.from_lpos prev_pos) prev_lexeme)
@@ -817,9 +814,6 @@ let lex_law (lexbuf : lexbuf) : token =
     | _ -> (
         (* Nested match for lower priority; `_` matches length 0 so we effectively retry the
            sub-match at the same point *)
-        let lexbuf = lexbuf in
-        (* workaround sedlex bug, see https://github.com/ocaml-community/sedlex/issues/12
-           (fixed in 3.1) *)
         match%sedlex lexbuf with
         | Star (Compl '\n'), ('\n' | eof) -> LAW_TEXT (Utf8.lexeme lexbuf)
         | _ -> L.raise_lexer_error (Pos.from_lpos prev_pos) prev_lexeme)