diff --git a/exercises/concept/dna-encoding/.meta/example.gleam b/exercises/concept/dna-encoding/.meta/example.gleam
index 36afd8814..26b4f1df9 100644
--- a/exercises/concept/dna-encoding/.meta/example.gleam
+++ b/exercises/concept/dna-encoding/.meta/example.gleam
@@ -34,7 +34,7 @@ fn do_encode(dna: List(Nucleotide), acc: BitString) -> BitString {
   case dna {
     [] -> acc
     [nucleotide, ..rest] ->
-      do_encode(rest, <<acc:bit_string, encode_nucleotide(nucleotide):2>>)
+      do_encode(rest, <<acc:bits, encode_nucleotide(nucleotide):2>>)
   }
 }
 
@@ -48,10 +48,10 @@ fn do_decode(
 ) -> Result(List(Nucleotide), Nil) {
   case dna {
     <<>> -> Ok(list.reverse(acc))
-    <<0b00:2, rest:bit_string>> -> do_decode(rest, [Adenine, ..acc])
-    <<0b01:2, rest:bit_string>> -> do_decode(rest, [Cytosine, ..acc])
-    <<0b10:2, rest:bit_string>> -> do_decode(rest, [Guanine, ..acc])
-    <<0b11:2, rest:bit_string>> -> do_decode(rest, [Thymine, ..acc])
+    <<0b00:2, rest:bits>> -> do_decode(rest, [Adenine, ..acc])
+    <<0b01:2, rest:bits>> -> do_decode(rest, [Cytosine, ..acc])
+    <<0b10:2, rest:bits>> -> do_decode(rest, [Guanine, ..acc])
+    <<0b11:2, rest:bits>> -> do_decode(rest, [Thymine, ..acc])
     _ -> Error(Nil)
   }
 }
diff --git a/exercises/practice/variable-length-quantity/.meta/example.gleam b/exercises/practice/variable-length-quantity/.meta/example.gleam
index 50ef29433..8959ed5da 100644
--- a/exercises/practice/variable-length-quantity/.meta/example.gleam
+++ b/exercises/practice/variable-length-quantity/.meta/example.gleam
@@ -36,9 +36,8 @@ fn do_decode(string: BitString, acc: Int) -> Result(List(Int), Error) {
   case string {
     <<>> -> Ok([])
     <<1:1, _:7>> -> Error(IncompleteSequence)
-    <<1:1, large_bits:7, rest:bit_string>> ->
-      do_decode(rest, 128 * acc + large_bits)
-    <<0:1, last_bits:7, rest:bit_string>> -> {
+    <<1:1, large_bits:7, rest:bits>> -> do_decode(rest, 128 * acc + large_bits)
+    <<0:1, last_bits:7, rest:bits>> -> {
       use integers <- result.then(do_decode(rest, 0))
       Ok([128 * acc + last_bits, ..integers])
     }