diff --git a/CHANGELOG.md b/CHANGELOG.md
index bac14dfd..01231450 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,7 +28,9 @@ If possible, provide tooling that performs the changes, e.g. a shell-script.
 
 #### I/O
 
-* To avoid using seqan3::io we changed the usage of the `seqan3::input_file_validator` and
-`seqan3::output_file_validator`, you now have to give the formats explicitly:
-`sharg::input_file_validator validator{std::vector{std::string{"exe"}, std::string{"fasta"}}};` and
-`sharg::output_file_validator validator{sharg::output_file_open_options::create_new, std::vector{std::string{"exe"}, std::string{"fasta"}}};`.
+* In order to avoid using the seqan3 I/O module, you now have to give a list of file extensions explicitly to
+`sharg::input_file_validator` and `sharg::output_file_validator`:
+For example `sharg::input_file_validator validator{std::vector<std::string>{{"exe"}, {"fasta"}}};`. Please follow
+https://github.com/seqan/seqan3/issues/2927 to see how the list of file extensions can be extracted from seqan3 files.
+We also removed the `default_extensions()` function, as we now can construct `output_file_validator` with just a given
+mode: `output_file_validator(output_file_open_options const mode)`. The extensions will be an empty array in this case.
diff --git a/include/sharg/validators.hpp b/include/sharg/validators.hpp
index 8422363e..13578dfa 100644
--- a/include/sharg/validators.hpp
+++ b/include/sharg/validators.hpp
@@ -467,9 +467,7 @@ class file_validator_base
  *
  * \include test/snippet/argument_parser/validators_input_file.cpp
  *
- * The valid extensions can also be obtained from a seqan3 formatted file type, e.g. sharg::sequence_input_file, if
- * it is given as template argument to this class. The following snippet demonstrates the different ways to instantiate
- * the sharg::input_file_validator.
+ * The following snippet demonstrates the different ways to instantiate the sharg::input_file_validator.
  *
  * \include test/snippet/argument_parser/validators_input_file_ext_from_file.cpp
  *
@@ -488,6 +486,7 @@ class input_file_validator : public file_validator_base
      * \{
      */
 
+    input_file_validator() = default;                                         //!< Defaulted.
     input_file_validator(input_file_validator const &) = default;             //!< Defaulted.
     input_file_validator(input_file_validator &&) = default;                  //!< Defaulted.
     input_file_validator & operator=(input_file_validator const &) = default; //!< Defaulted.
@@ -575,9 +574,7 @@ enum class output_file_open_options
  *
  * \include test/snippet/argument_parser/validators_output_file.cpp
  *
- * The valid extensions can also be obtained from a seqan3 formatted file type, e.g. sharg::sequence_input_file, if
- * it is given as template argument to this class. The following snippet demonstrates the different ways to instantiate
- * the sharg::output_file_validator.
+ * The following snippet demonstrates the different ways to instantiate the sharg::output_file_validator.
  *
  * \include test/snippet/argument_parser/validators_output_file_ext_from_file.cpp
  *
@@ -597,23 +594,31 @@ class output_file_validator : public file_validator_base
      */
 
     //!\copydoc sharg::input_file_validator::input_file_validator()
-    output_file_validator() : output_file_validator{output_file_open_options::create_new}
-    {}
+    output_file_validator() : output_file_validator{output_file_open_options::create_new} {}
 
-    output_file_validator(output_file_validator const &) = default; //!< Defaulted.
-    output_file_validator(output_file_validator &&) = default; //!< Defaulted.
+    output_file_validator(output_file_validator const &) = default;             //!< Defaulted.
+    output_file_validator(output_file_validator &&) = default;                  //!< Defaulted.
     output_file_validator & operator=(output_file_validator const &) = default; //!< Defaulted.
-    output_file_validator & operator=(output_file_validator &&) = default; //!< Defaulted.
+    output_file_validator & operator=(output_file_validator &&) = default;      //!< Defaulted.
     virtual ~output_file_validator() = default; //!< Virtual Destructor.
 
+    /*!\brief Constructs from a given overwrite mode.
+     * \param[in] mode A sharg::output_file_open_options indicating whether the validator throws if a file already
+                       exists.
+     */
+    explicit output_file_validator(output_file_open_options const mode)
+        : file_validator_base{}, mode{mode}
+    {
+        file_validator_base::extensions = std::move(std::vector<std::string> {});
+        file_validator_base::extensions_str = std::string {};
+    }
+
     /*!\brief Constructs from a given overwrite mode and a list of valid extensions.
      * \param[in] mode A sharg::output_file_open_options indicating whether the validator throws if a file already
                        exists.
-     * \param[in] extensions The valid extensions to validate for. Defaults to
-     *                       sharg::output_file_validator::default_extensions.
+     * \param[in] extensions The valid extensions to validate for.
      */
-    explicit output_file_validator(output_file_open_options const mode,
-                                   std::vector<std::string> extensions = default_extensions())
+    explicit output_file_validator(output_file_open_options const mode, std::vector<std::string> extensions)
         : file_validator_base{}, mode{mode}
     {
         file_validator_base::extensions = std::move(extensions);
@@ -624,14 +629,6 @@ class output_file_validator : public file_validator_base
     using file_validator_base::file_validator_base;
     //!\}
 
-    /*!\brief The default extensions of `file_t`.
-     * \returns A list of default extensions for `file_t`, will be empty if `file_t` is `void`.
-     */
-    static std::vector<std::string> default_extensions()
-    {
-        return {};
-    }
-
     // Import the base::operator()
     using file_validator_base::operator();