diff --git a/lib/credo/backports.ex b/lib/credo/backports.ex
deleted file mode 100644
index cabb63bf4..000000000
--- a/lib/credo/backports.ex
+++ /dev/null
@@ -1,25 +0,0 @@
-defmodule Credo.Backports do
-  defmodule Enum do
-    if Version.match?(System.version(), ">= 1.12.0-rc") do
-      def slice(a, x..y) do
-        Elixir.Enum.slice(a, x..y//1)
-      end
-    end
-
-    def slice(a, b) do
-      Elixir.Enum.slice(a, b)
-    end
-  end
-
-  defmodule String do
-    if Version.match?(System.version(), ">= 1.12.0-rc") do
-      def slice(a, x..y) do
-        Elixir.String.slice(a, x..y//1)
-      end
-    end
-
-    def slice(a, b) do
-      Elixir.String.slice(a, b)
-    end
-  end
-end
diff --git a/lib/credo/check/config_comment.ex b/lib/credo/check/config_comment.ex
index def6d1943..71ff518aa 100644
--- a/lib/credo/check/config_comment.ex
+++ b/lib/credo/check/config_comment.ex
@@ -135,7 +135,7 @@ defmodule Credo.Check.ConfigComment do
   defp value_for(param_string) do
     if regex_value?(param_string) do
       param_string
-      |> Credo.Backports.String.slice(1..-2//-1)
+      |> String.slice(1..-2//1)
       |> Regex.compile!("i")
     else
       String.to_atom("Elixir.#{param_string}")
diff --git a/lib/credo/check/consistency/multi_alias_import_require_use/collector.ex b/lib/credo/check/consistency/multi_alias_import_require_use/collector.ex
index 748338526..0ba238089 100644
--- a/lib/credo/check/consistency/multi_alias_import_require_use/collector.ex
+++ b/lib/credo/check/consistency/multi_alias_import_require_use/collector.ex
@@ -42,7 +42,7 @@ defmodule Credo.Check.Consistency.MultiAliasImportRequireUse.Collector do
     aliases =
       case arguments do
         [{:__aliases__, _, nested_modules}] when length(nested_modules) > 1 ->
-          base_name = Credo.Backports.Enum.slice(nested_modules, 0..-2//-1)
+          base_name = Enum.slice(nested_modules, 0..-2//1)
           {:single, base_name}
 
         [{{:., _, [{:__aliases__, _, _namespaces}, :{}]}, _, _nested_aliases}] ->
diff --git a/lib/credo/check/consistency/space_around_operators.ex b/lib/credo/check/consistency/space_around_operators.ex
index 66ec78d18..f529f57de 100644
--- a/lib/credo/check/consistency/space_around_operators.ex
+++ b/lib/credo/check/consistency/space_around_operators.ex
@@ -139,7 +139,7 @@ defmodule Credo.Check.Consistency.SpaceAroundOperators do
 
   defp number_in_range?(line, column) do
     line
-    |> Credo.Backports.String.slice(column..-1)
+    |> String.slice(column..-1//1)
     |> String.match?(~r/^\d+\.\./)
   end
 
@@ -166,13 +166,13 @@ defmodule Credo.Check.Consistency.SpaceAroundOperators do
     # -1 because we need to subtract the operator
     binary_pattern_end_after? =
       line
-      |> Credo.Backports.String.slice(column..-1)
+      |> String.slice(column..-1//1)
       |> String.match?(~r/\>\>/)
 
     # -1 because we need to subtract the operator
     typed_after? =
       line
-      |> Credo.Backports.String.slice(column..-1)
+      |> String.slice(column..-1//1)
       |> String.match?(~r/^\s*(integer|native|signed|unsigned|binary|size|little|float)/)
 
     # -2 because we need to subtract the operator
diff --git a/lib/credo/check/readability/large_numbers.ex b/lib/credo/check/readability/large_numbers.ex
index 6023ba815..783042182 100644
--- a/lib/credo/check/readability/large_numbers.ex
+++ b/lib/credo/check/readability/large_numbers.ex
@@ -181,12 +181,12 @@ defmodule Credo.Check.Readability.LargeNumbers do
       Enum.map(allowed_trailing_digits, fn trailing_digits ->
         if String.length(string) > trailing_digits do
           base =
-            Credo.Backports.String.slice(string, 0..(-1 * trailing_digits - 1))
+            String.slice(string, 0..(-1 * trailing_digits - 1)//1)
             |> String.reverse()
             |> String.replace(~r/(\d{3})(?=\d)/, "\\1_")
             |> String.reverse()
 
-          trailing = Credo.Backports.String.slice(string, (-1 * trailing_digits)..-1)
+          trailing = String.slice(string, (-1 * trailing_digits)..-1//1)
 
           "#{base}_#{trailing}"
         end
@@ -236,7 +236,7 @@ defmodule Credo.Check.Readability.LargeNumbers do
 
     ending_of_number =
       ~r/^([0-9_\.]+)/
-      |> Regex.run(Credo.Backports.String.slice(line, (column1 + 1)..-1))
+      |> Regex.run(String.slice(line, (column1 + 1)..-1//1))
       |> List.wrap()
       |> List.last()
       |> to_string()
diff --git a/lib/credo/check/readability/parentheses_on_zero_arity_defs.ex b/lib/credo/check/readability/parentheses_on_zero_arity_defs.ex
index e70ebf4f0..dc24aedb3 100644
--- a/lib/credo/check/readability/parentheses_on_zero_arity_defs.ex
+++ b/lib/credo/check/readability/parentheses_on_zero_arity_defs.ex
@@ -89,7 +89,7 @@ defmodule Credo.Check.Readability.ParenthesesOnZeroArityDefs do
     name_size = text |> to_string |> String.length()
     skip = (SourceFile.column(source_file, line_no, text) || -1) + name_size - 1
 
-    Credo.Backports.String.slice(line, skip..-1)
+    String.slice(line, skip..-1//1)
   end
 
   defp issue_for(issue_meta, name, line_no, kind) do
diff --git a/lib/credo/check/warning/unused_function_return_helper.ex b/lib/credo/check/warning/unused_function_return_helper.ex
index 56d0aba75..fefbd04cf 100644
--- a/lib/credo/check/warning/unused_function_return_helper.ex
+++ b/lib/credo/check/warning/unused_function_return_helper.ex
@@ -132,7 +132,7 @@ defmodule Credo.Check.Warning.UnusedFunctionReturnHelper do
          when is_list(arguments) do
       # IO.inspect(ast, label: "#{unquote(op)} (#{Macro.to_string(candidate)} #{acc})")
 
-      head_expression = Credo.Backports.Enum.slice(arguments, 0..-2//-1)
+      head_expression = Enum.slice(arguments, 0..-2//1)
 
       if Credo.Code.contains_child?(head_expression, candidate) do
         {nil, :VERIFIED}
diff --git a/lib/credo/cli/command/diff/task/get_git_diff.ex b/lib/credo/cli/command/diff/task/get_git_diff.ex
index 843da8f2a..1a489320f 100644
--- a/lib/credo/cli/command/diff/task/get_git_diff.ex
+++ b/lib/credo/cli/command/diff/task/get_git_diff.ex
@@ -104,13 +104,13 @@ defmodule Credo.CLI.Command.Diff.Task.GetGitDiff do
   defp run_credo_on_dir(exec, dirname, previous_git_ref, given_ref) do
     {previous_argv, _last_arg} =
       exec.argv
-      |> Credo.Backports.Enum.slice(1..-1//-1)
+      |> Enum.slice(1..-1//1)
       |> Enum.reduce({[], nil}, fn
-        _, {argv, "--working-dir"} -> {Credo.Backports.Enum.slice(argv, 1..-2//-1), nil}
-        _, {argv, "--from-git-merge-base"} -> {Credo.Backports.Enum.slice(argv, 1..-2//-1), nil}
-        _, {argv, "--from-git-ref"} -> {Credo.Backports.Enum.slice(argv, 1..-2//-1), nil}
-        _, {argv, "--from-dir"} -> {Credo.Backports.Enum.slice(argv, 1..-2//-1), nil}
-        _, {argv, "--since"} -> {Credo.Backports.Enum.slice(argv, 1..-2//-1), nil}
+        _, {argv, "--working-dir"} -> {Enum.slice(argv, 1..-2//1), nil}
+        _, {argv, "--from-git-merge-base"} -> {Enum.slice(argv, 1..-2//1), nil}
+        _, {argv, "--from-git-ref"} -> {Enum.slice(argv, 1..-2//1), nil}
+        _, {argv, "--from-dir"} -> {Enum.slice(argv, 1..-2//1), nil}
+        _, {argv, "--since"} -> {Enum.slice(argv, 1..-2//1), nil}
         "--show-fixed", {argv, _last_arg} -> {argv, nil}
         "--show-kept", {argv, _last_arg} -> {argv, nil}
         ^previous_git_ref, {argv, _last_arg} -> {argv, nil}
diff --git a/lib/credo/cli/command/explain/output/default.ex b/lib/credo/cli/command/explain/output/default.ex
index e1ea503fe..0492f41f6 100644
--- a/lib/credo/cli/command/explain/output/default.ex
+++ b/lib/credo/cli/command/explain/output/default.ex
@@ -269,7 +269,7 @@ defmodule Credo.CLI.Command.Explain.Output.Default do
     |> String.trim()
     |> String.split("\n")
     |> Enum.flat_map(&format_explanation(&1, outer_color))
-    |> Credo.Backports.Enum.slice(0..-2//-1)
+    |> Enum.slice(0..-2//1)
     |> UI.puts()
 
     UI.puts_edge([outer_color, :faint])
diff --git a/lib/credo/code/interpolation_helper.ex b/lib/credo/code/interpolation_helper.ex
index b64b70e85..deb95034a 100644
--- a/lib/credo/code/interpolation_helper.ex
+++ b/lib/credo/code/interpolation_helper.ex
@@ -58,7 +58,7 @@ defmodule Credo.Code.InterpolationHelper do
     line = String.to_charlist(line)
     part1 = Enum.slice(line, 0, col_start - 1)
     part2 = String.to_charlist(String.duplicate(char, length))
-    part3 = Credo.Backports.Enum.slice(line, (col_end - 1)..-1)
+    part3 = Enum.slice(line, (col_end - 1)..-1//1)
     List.to_string(part1 ++ part2 ++ part3)
   end
 
@@ -271,6 +271,6 @@ defmodule Credo.Code.InterpolationHelper do
     # col-1 to account for col being 1-based
     start = max(col_end - 1, 0)
 
-    Credo.Backports.String.slice(line, start..-1)
+    String.slice(line, start..-1)
   end
 end