diff --git a/lib/credo/check/config_comment.ex b/lib/credo/check/config_comment.ex
index def6d1943..78fee6aff 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)
+      |> Credo.Backports.String.slice(Range.new(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 3165a57ae..d4aa681f8 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
@@ -38,7 +38,7 @@ 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 = Credo.Backports.Enum.slice(nested_modules, Range.new(0, -2, -1))
           {:single, base_name}
 
         [{{:., _, [{:__aliases__, _, _namespaces}, :{}]}, _, _nested_aliases}] ->
diff --git a/lib/credo/check/readability/large_numbers.ex b/lib/credo/check/readability/large_numbers.ex
index 6023ba815..f0aa4f40b 100644
--- a/lib/credo/check/readability/large_numbers.ex
+++ b/lib/credo/check/readability/large_numbers.ex
@@ -181,7 +181,7 @@ 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))
+            Credo.Backports.String.slice(string, Range.new(0, -1 * trailing_digits - 1, -1))
             |> String.reverse()
             |> String.replace(~r/(\d{3})(?=\d)/, "\\1_")
             |> String.reverse()
diff --git a/lib/credo/check/warning/unused_function_return_helper.ex b/lib/credo/check/warning/unused_function_return_helper.ex
index a61b12f36..46877d105 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 = Credo.Backports.Enum.slice(arguments, Range.new(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..e32c5230e 100644
--- a/lib/credo/cli/command/diff/task/get_git_diff.ex
+++ b/lib/credo/cli/command/diff/task/get_git_diff.ex
@@ -104,17 +104,31 @@ 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)
+      |> Credo.Backports.Enum.slice(Range.new(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}
-        "--show-fixed", {argv, _last_arg} -> {argv, nil}
-        "--show-kept", {argv, _last_arg} -> {argv, nil}
-        ^previous_git_ref, {argv, _last_arg} -> {argv, nil}
-        arg, {argv, _last_arg} -> {argv ++ [arg], arg}
+        _, {argv, "--working-dir"} ->
+          {Credo.Backports.Enum.slice(argv, Range.new(1, -2, -1)), nil}
+
+        _, {argv, "--from-git-merge-base"} ->
+          {Credo.Backports.Enum.slice(argv, Range.new(1, -2, -1)), nil}
+
+        _, {argv, "--from-git-ref"} ->
+          {Credo.Backports.Enum.slice(argv, Range.new(1, -2, -1)), nil}
+
+        _, {argv, "--from-dir"} ->
+          {Credo.Backports.Enum.slice(argv, Range.new(1, -2, -1)), nil}
+
+        _, {argv, "--since"} ->
+          {Credo.Backports.Enum.slice(argv, Range.new(1, -2, -1)), nil}
+
+        "--show-kept", {argv, _last_arg} ->
+          {argv, nil}
+
+        ^previous_git_ref, {argv, _last_arg} ->
+          {argv, nil}
+
+        arg, {argv, _last_arg} ->
+          {argv ++ [arg], arg}
       end)
 
     run_credo(exec, previous_git_ref, dirname, previous_argv, given_ref)
diff --git a/lib/credo/cli/command/explain/output/default.ex b/lib/credo/cli/command/explain/output/default.ex
index 300c178a1..7d19b7507 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)
+    |> Credo.Backports.Enum.slice(Range.new(0, -2, -1))
     |> UI.puts()
 
     UI.puts_edge([outer_color, :faint])