diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76d49f8..fb856a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
   - "filepart", "part", "crdownload": Partially downloaded files, renaming could break download
   - "bak", "backup": Backup copies are a common idiom (e.g. "game.exe.bak") and should be respected
 ### Fixed
-- Support for many file types that are subcategories of others (e.g., fif will no longer rename apk files to zip)
+- Support for many file types that are subcategories of others (e.g., fif will no longer rename apk files to zip) (#1)
 
 ## v0.5.1 - 2022-04-12
 ### Added
diff --git a/README.md b/README.md
index c190a74..15a67e7 100644
--- a/README.md
+++ b/README.md
@@ -232,6 +232,10 @@ same line (["OTBS"](https://en.wikipedia.org/wiki/Indentation_style#Variant:_1TB
 For more detailed information on the formatting rules used by this project, see the configured options in
 [`rustfmt.toml`](https://gitlab.com/Lynnesbian/fif/-/blob/master/rustfmt.toml).
 
+## Additional credits
+Some of the code for correctly handling files with multiple valid extensions (particularly in the case of the 
+Portable Executable format) comes from [Czkawka](https://github.com/qarmin/czkawka)
+
 ## License
 Copyright (C) 2021 Lynnesbian
 
diff --git a/src/files.rs b/src/files.rs
index fc7218f..9f07777 100644
--- a/src/files.rs
+++ b/src/files.rs
@@ -127,7 +127,6 @@ pub fn scan_file(entry: &DirEntry, canonical_paths: bool) -> Result<Findings, Sc
 		Ok(Some(result)) => result,
 	};
 
-
 	// determine whether or not the file's current extension is valid
 	let valid = if let Some(entry_ext) = path.extension() {
 		// discard invalid UTF-8 and convert to lowercase. all extensions in both backend's databases are lowercase