diff --git a/.github/workflows/lang-elixir-postgrex.yml b/.github/workflows/lang-elixir-postgrex.yml
index 858f145f..7fe884d4 100644
--- a/.github/workflows/lang-elixir-postgrex.yml
+++ b/.github/workflows/lang-elixir-postgrex.yml
@@ -39,8 +39,14 @@ jobs:
       matrix:
         os: [ 'ubuntu-latest' ]
         cratedb-version: [ 'nightly' ]
-        otp-version: ['26', '27']
-        elixir-version: ['1.17', '1.18']
+        otp-version: [
+          '27',
+          '28',
+        ]
+        elixir-version: [
+          '1.18',
+          '1.19',
+        ]
 
     services:
       cratedb:
diff --git a/by-language/elixir-postgrex/mix.exs b/by-language/elixir-postgrex/mix.exs
index 6a820754..e9236f02 100644
--- a/by-language/elixir-postgrex/mix.exs
+++ b/by-language/elixir-postgrex/mix.exs
@@ -17,7 +17,7 @@ defmodule CrateDBExample.MixProject do
   defp deps() do
     [
       {:jason, "~> 1.4"},
-      {:postgrex, "~> 0.21.0"},
+      {:postgrex, "~> 0.21"},
     ]
   end
 
diff --git a/by-language/elixir-postgrex/test/basic_test.exs b/by-language/elixir-postgrex/test/basic_test.exs
index d2472df1..4a4d3434 100644
--- a/by-language/elixir-postgrex/test/basic_test.exs
+++ b/by-language/elixir-postgrex/test/basic_test.exs
@@ -90,9 +90,10 @@ defmodule CrateDBTest do
         SELECT id
         FROM testdrive.elixir
         WHERE knn_match(data, ?, 2)
-        ORDER BY id;
-        ", [[0.1, 0.2, 0.3]])
-    assert [~c"*", ~c"+", ~c",", ~c"-"] == result.rows
+        ORDER BY VECTOR_SIMILARITY(data, ?) DESC
+        LIMIT 3;
+        ", [[0.1, 0.2, 0.3], [0.1, 0.2, 0.3]])
+    assert [[42], [44], [45]] == result.rows
 
   end