diff --git a/lib/credo/check/params.ex b/lib/credo/check/params.ex
index 39df819cc..08ca4fa4f 100644
--- a/lib/credo/check/params.ex
+++ b/lib/credo/check/params.ex
@@ -36,7 +36,7 @@ defmodule Credo.Check.Params do
   def get(params, field, check_mod) do
     case params[field] do
       nil ->
-        check_mod.param_defaults[field]
+        check_mod.param_defaults()[field]
 
       val ->
         val
@@ -71,12 +71,12 @@ defmodule Credo.Check.Params do
 
   @doc false
   def category(params, check_mod) do
-    params[:__category__] || params[:category] || check_mod.category
+    params[:__category__] || params[:category] || check_mod.category()
   end
 
   @doc false
   def exit_status(params, check_mod) do
-    params[:__exit_status__] || params[:exit_status] || check_mod.exit_status
+    params[:__exit_status__] || params[:exit_status] || check_mod.exit_status()
   end
 
   @doc false
@@ -95,11 +95,11 @@ defmodule Credo.Check.Params do
 
   @doc false
   def priority(params, check_mod) do
-    params[:__priority__] || params[:priority] || check_mod.base_priority
+    params[:__priority__] || params[:priority] || check_mod.base_priority()
   end
 
   @doc false
   def tags(params, check_mod) do
-    params[:__tags__] || params[:tags] || check_mod.tags
+    params[:__tags__] || params[:tags] || check_mod.tags()
   end
 end
diff --git a/lib/credo/cli/command/diff/output/default.ex b/lib/credo/cli/command/diff/output/default.ex
index 154a23f65..467e6e963 100644
--- a/lib/credo/cli/command/diff/output/default.ex
+++ b/lib/credo/cli/command/diff/output/default.ex
@@ -316,7 +316,7 @@ defmodule Credo.CLI.Command.Diff.Output.Default do
       UI.edge(outer_color),
       outer_color,
       tag_style,
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       " ",
       priority |> Output.priority_arrow(),
       :normal,
diff --git a/lib/credo/cli/command/explain/explain_command.ex b/lib/credo/cli/command/explain/explain_command.ex
index b58167146..bcbdd4880 100644
--- a/lib/credo/cli/command/explain/explain_command.ex
+++ b/lib/credo/cli/command/explain/explain_command.ex
@@ -84,10 +84,10 @@ defmodule Credo.CLI.Command.Explain.ExplainCommand do
 
     defp cast_to_explanation(check) do
       %{
-        category: check.category,
+        category: check.category(),
         check: check,
-        explanation_for_issue: check.explanation,
-        priority: check.base_priority
+        explanation_for_issue: check.explanation(),
+        priority: check.base_priority()
       }
     end
   end
@@ -181,7 +181,7 @@ defmodule Credo.CLI.Command.Explain.ExplainCommand do
         category: issue.category,
         check: issue.check,
         column: issue.column,
-        explanation_for_issue: issue.check.explanation,
+        explanation_for_issue: issue.check.explanation(),
         filename: issue.filename,
         line_no: issue.line_no,
         message: issue.message,
diff --git a/lib/credo/cli/command/explain/output/default.ex b/lib/credo/cli/command/explain/output/default.ex
index 75426b41e..490032284 100644
--- a/lib/credo/cli/command/explain/output/default.ex
+++ b/lib/credo/cli/command/explain/output/default.ex
@@ -52,7 +52,7 @@ defmodule Credo.CLI.Command.Explain.Output.Default do
          term_width
        ) do
     check_name = check |> to_string |> String.replace(~r/^Elixir\./, "")
-    color = Output.check_color(check.category)
+    color = Output.check_color(check.category())
 
     UI.puts()
 
@@ -84,9 +84,9 @@ defmodule Credo.CLI.Command.Explain.Output.Default do
       inner_color,
       tag_style,
       "  ",
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       :reset,
-      " Category: #{check.category} "
+      " Category: #{check.category()} "
     ]
     |> UI.puts()
 
@@ -189,9 +189,9 @@ defmodule Credo.CLI.Command.Explain.Output.Default do
       inner_color,
       tag_style,
       "  ",
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       :reset,
-      " Category: #{check.category} "
+      " Category: #{check.category()} "
     ]
     |> UI.puts()
 
diff --git a/lib/credo/cli/command/list/output/default.ex b/lib/credo/cli/command/list/output/default.ex
index dd624d3b1..fe85fe8b2 100644
--- a/lib/credo/cli/command/list/output/default.ex
+++ b/lib/credo/cli/command/list/output/default.ex
@@ -102,7 +102,7 @@ defmodule Credo.CLI.Command.List.Output.Default do
       UI.edge(outer_color),
       inner_color,
       tag_style,
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       " ",
       priority |> Output.priority_arrow(),
       :normal,
diff --git a/lib/credo/cli/command/suggest/output/default.ex b/lib/credo/cli/command/suggest/output/default.ex
index 21d49182b..60f4ed917 100644
--- a/lib/credo/cli/command/suggest/output/default.ex
+++ b/lib/credo/cli/command/suggest/output/default.ex
@@ -250,7 +250,7 @@ defmodule Credo.CLI.Command.Suggest.Output.Default do
       UI.edge(outer_color),
       outer_color,
       tag_style,
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       " ",
       priority |> Output.priority_arrow(),
       :normal,
diff --git a/lib/credo/cli/command/suggest/suggest_command.ex b/lib/credo/cli/command/suggest/suggest_command.ex
index d67a41710..0f6a95727 100644
--- a/lib/credo/cli/command/suggest/suggest_command.ex
+++ b/lib/credo/cli/command/suggest/suggest_command.ex
@@ -115,7 +115,7 @@ defmodule Credo.CLI.Command.Suggest.SuggestCommand do
     def modify_config_to_only_include_needed_checks(%Credo.Execution{} = exec, files_that_changed) do
       checks =
         Enum.map(exec.checks, fn {check, params} ->
-          if check.category == :consistency do
+          if check.category() == :consistency do
             {check, params}
           else
             {check, Params.put_rerun_files_that_changed(params, files_that_changed)}
diff --git a/lib/credo/cli/output.ex b/lib/credo/cli/output.ex
index d85300ac4..cf7fad119 100644
--- a/lib/credo/cli/output.ex
+++ b/lib/credo/cli/output.ex
@@ -33,7 +33,7 @@ defmodule Credo.CLI.Output do
   end
 
   def check_tag(check_mod, in_parens) do
-    check_mod.category
+    check_mod.category()
     |> to_string
     |> check_tag(in_parens)
   end
@@ -55,8 +55,8 @@ defmodule Credo.CLI.Output do
     |> check_color
   end
 
-  def check_color(check_mod) do
-    check_mod.category
+  def check_color(%{} = issue_or_map) do
+    issue_or_map.category
     |> to_string
     |> check_color
   end
diff --git a/lib/credo/cli/output/formatter/oneline.ex b/lib/credo/cli/output/formatter/oneline.ex
index 9c51ce371..14c656aa1 100644
--- a/lib/credo/cli/output/formatter/oneline.ex
+++ b/lib/credo/cli/output/formatter/oneline.ex
@@ -28,7 +28,7 @@ defmodule Credo.CLI.Output.Formatter.Oneline do
 
     [
       inner_color,
-      Output.check_tag(check.category),
+      Output.check_tag(check.category()),
       " ",
       priority |> Output.priority_arrow(),
       " ",
diff --git a/lib/credo/cli/output/formatter/sarif.ex b/lib/credo/cli/output/formatter/sarif.ex
index ef808c81e..50553d363 100644
--- a/lib/credo/cli/output/formatter/sarif.ex
+++ b/lib/credo/cli/output/formatter/sarif.ex
@@ -17,21 +17,21 @@ defmodule Credo.CLI.Output.Formatter.SARIF do
 
     final_rules =
       issues
-      |> Enum.uniq_by(& &1.check.id)
+      |> Enum.uniq_by(& &1.check.id())
       |> Enum.map(fn issue ->
         %{
-          "id" => issue.check.id,
+          "id" => issue.check.id(),
           "name" => Credo.Code.Name.full(issue.check),
           "fullDescription" => %{
-            "text" => issue.check.explanation |> String.replace("`", "'"),
-            "markdown" => issue.check.explanation
+            "text" => issue.check.explanation() |> String.replace("`", "'"),
+            "markdown" => issue.check.explanation()
           },
           "properties" => %{
             "tags" => [
               issue.category
             ]
           },
-          "helpUri" => issue.check.docs_uri
+          "helpUri" => issue.check.docs_uri()
         }
       end)
 
@@ -158,21 +158,21 @@ defmodule Credo.CLI.Output.Formatter.SARIF do
 
     rule_and_issue = {
       %{
-        "id" => issue.check.id,
+        "id" => issue.check.id(),
         "name" => Credo.Code.Name.full(issue.check),
         "fullDescription" => %{
-          "text" => issue.check.explanation |> String.replace("`", "'"),
-          "markdown" => issue.check.explanation
+          "text" => issue.check.explanation() |> String.replace("`", "'"),
+          "markdown" => issue.check.explanation()
         },
         "properties" => %{
           "tags" => [
             issue.category
           ]
         },
-        "helpUri" => issue.check.docs_uri
+        "helpUri" => issue.check.docs_uri()
       },
       %{
-        "ruleId" => issue.check.id,
+        "ruleId" => issue.check.id(),
         "level" => sarif_level,
         "rank" => priority_to_sarif_rank(issue.priority),
         "message" => %{
@@ -208,7 +208,7 @@ defmodule Credo.CLI.Output.Formatter.SARIF do
     rule_and_issue
     |> remove_nil_endcolumn(!column_end)
     |> remove_warning_level(sarif_level == :warning)
-    |> remove_redundant_name(issue.check.id == Credo.Code.Name.full(issue.check))
+    |> remove_redundant_name(issue.check.id() == Credo.Code.Name.full(issue.check))
   end
 
   defp remove_nil_endcolumn(sarif, false), do: sarif
diff --git a/lib/credo/cli/task/prepare_checks_to_run.ex b/lib/credo/cli/task/prepare_checks_to_run.ex
index 0da823497..97e8d5847 100644
--- a/lib/credo/cli/task/prepare_checks_to_run.ex
+++ b/lib/credo/cli/task/prepare_checks_to_run.ex
@@ -49,7 +49,7 @@ defmodule Credo.CLI.Task.PrepareChecksToRun do
       Enum.reject(exec.checks.enabled, fn
         # deprecated
         {check} ->
-          Credo.Priority.to_integer(check.base_priority) < below_priority
+          Credo.Priority.to_integer(check.base_priority()) < below_priority
 
         {_check, false} ->
           true
@@ -83,7 +83,7 @@ defmodule Credo.CLI.Task.PrepareChecksToRun do
   end
 
   defp matches_requirement?({check}, elixir_version) do
-    Version.match?(elixir_version, check.elixir_version)
+    Version.match?(elixir_version, check.elixir_version())
   end
 
   defp to_match_regexes(nil), do: []
diff --git a/lib/credo/cli/task/set_relevant_issues.ex b/lib/credo/cli/task/set_relevant_issues.ex
index 51483f689..29f3aa00a 100644
--- a/lib/credo/cli/task/set_relevant_issues.ex
+++ b/lib/credo/cli/task/set_relevant_issues.ex
@@ -12,7 +12,7 @@ defmodule Credo.CLI.Task.SetRelevantIssues do
       |> Filter.important(exec)
       |> Filter.valid_issues(exec)
       |> Enum.sort_by(fn issue ->
-        {issue.check.id, issue.filename, issue.line_no}
+        {issue.check.id(), issue.filename, issue.line_no}
       end)
 
     put_issues(exec, issues)
diff --git a/lib/credo/execution.ex b/lib/credo/execution.ex
index 3e9750f9a..a621cb771 100644
--- a/lib/credo/execution.ex
+++ b/lib/credo/execution.ex
@@ -255,14 +255,14 @@ defmodule Credo.Execution do
   """
   def tags_for_check(check, params)
 
-  def tags_for_check(check, nil), do: check.tags
-  def tags_for_check(check, []), do: check.tags
+  def tags_for_check(check, nil), do: check.tags()
+  def tags_for_check(check, []), do: check.tags()
 
   def tags_for_check(check, params) when is_list(params) do
     params
     |> Credo.Check.Params.tags(check)
     |> Enum.flat_map(fn
-      :__initial__ -> check.tags
+      :__initial__ -> check.tags()
       tag -> [tag]
     end)
   end
diff --git a/lib/credo/execution/task/initialize_command.ex b/lib/credo/execution/task/initialize_command.ex
index a8e4bdbbb..329f5e8e9 100644
--- a/lib/credo/execution/task/initialize_command.ex
+++ b/lib/credo/execution/task/initialize_command.ex
@@ -22,7 +22,7 @@ defmodule Credo.Execution.Task.InitializeCommand do
   end
 
   defp cli_options_switches(command_mod) do
-    command_mod.cli_switches
+    command_mod.cli_switches()
     |> List.wrap()
     |> Enum.map(fn
       %{name: name, type: type} when is_binary(name) -> {String.to_atom(name), type}
@@ -31,7 +31,7 @@ defmodule Credo.Execution.Task.InitializeCommand do
   end
 
   defp cli_options_aliases(command_mod) do
-    command_mod.cli_switches
+    command_mod.cli_switches()
     |> List.wrap()
     |> Enum.map(fn
       %{name: name, alias: alias} when is_binary(name) -> {alias, String.to_atom(name)}
diff --git a/lib/credo/execution/task/parse_options.ex b/lib/credo/execution/task/parse_options.ex
index b81be9ec0..18d7564f5 100644
--- a/lib/credo/execution/task/parse_options.ex
+++ b/lib/credo/execution/task/parse_options.ex
@@ -30,7 +30,7 @@ defmodule Credo.Execution.Task.ParseOptions do
         command_name = Execution.get_command_name(exec)
         command_mod = Execution.get_command(exec, command_name)
 
-        command_mod.treat_unknown_args_as_files?
+        command_mod.treat_unknown_args_as_files?()
       else
         false
       end
diff --git a/lib/credo/execution/task/validate_config.ex b/lib/credo/execution/task/validate_config.ex
index 884309251..e8af47db7 100644
--- a/lib/credo/execution/task/validate_config.ex
+++ b/lib/credo/execution/task/validate_config.ex
@@ -67,7 +67,7 @@ defmodule Credo.Execution.Task.ValidateConfig do
   end
 
   defp do_warn_if_check_params_invalid({check, params}) do
-    valid_param_names = check.param_names ++ Params.builtin_param_names()
+    valid_param_names = check.param_names() ++ Params.builtin_param_names()
     check = check |> to_string |> String.to_existing_atom()
 
     Enum.each(params, fn {param_name, _param_value} ->