diff --git a/cfg/general_config.cfg b/cfg/general_config.cfg
index f349c22..b288cce 100644
--- a/cfg/general_config.cfg
+++ b/cfg/general_config.cfg
@@ -44,3 +44,6 @@ ARXIV_RSS_URL="https://rss.arxiv.org/atom/astro-ph"
 
 ADSABS_QUERY_URL="https://api.adsabs.harvard.edu/v1/search/query?"
 ADSABS_EXPORT_URL="https://api.adsabs.harvard.edu/v1/export/bibtexabs/"
+
+OPT_PDF_READER="/bin/flatpak run com.github.ahrm.sioyek"
+OPT_TXT_EDITOR="nvim"
diff --git a/src/utils.py b/src/utils.py
index 56f4db4..7e62681 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -45,6 +45,9 @@ FILTERS_DIR = os.environ.get("FILTERS_DIR")
 DB_DIR = os.environ.get("DB_DIR")
 PDF_DIR = os.environ.get("PDF_DIR")
 
+OPT_PDF_READER = os.environ.get("OPT_PDF_READER")
+OPT_TXT_EDITOR = os.environ.get("OPT_TXT_EDITOR")
+
 COLOUR_DEFAULT = "\033[0m"
 COLOUR_INPUT = "\033[36m"
 COLOUR_OUTPUT = "\033[32m"
@@ -404,7 +407,8 @@ def arxtic_comment(key, library):
     comment = block["arxtic_comment"]
     with open("comment.tmp", "w+") as file:
         file.write(comment)
-    subprocess.run(["nvim", "-c", "set syntax=markdown", "-c", "set cc=", "comment.tmp"])
+    subprocess.run(OPT_TXT_EDITOR.split(" ") + ["-c", "set syntax=markdown", 
+                                                "-c", "set cc=", "comment.tmp"])
     with open("comment.tmp", "r") as file:
         comment = "".join(file.readlines())
     subprocess.run(["rm", "comment.tmp"])
@@ -489,6 +493,6 @@ def arxtic_filename(key, library, filename):
 def launch_reader(key, library, directory=PDF_DIR):
     block = find(key, library)
     fname = block["arxtic_filename"]
-    subprocess.Popen(["/bin/flatpak", "run", "com.github.ahrm.sioyek", directory+fname],
+    subprocess.Popen(OPT_PDF_READER.split(" ") + [directory+fname],
                    stdout = subprocess.DEVNULL,
                    stderr = subprocess.DEVNULL)