diff --git a/src/api/main.py b/src/api/main.py
index 3d5ea32..64fa783 100644
--- a/src/api/main.py
+++ b/src/api/main.py
@@ -20,7 +20,7 @@ def get_app() -> FastAPI:
     """
     app = FastAPI(
         title="Masquer API",
-        summary="A tool to generate random user-agent and referer data for GET requests.",
+        summary="A tool to generate random user-agent and referer data for HTTP requests.",
         description=DESCRIPTION,
         version=__version__,
         license_info={
diff --git a/update.py b/update.py
index 4c41e55..1a82f5b 100644
--- a/update.py
+++ b/update.py
@@ -1,6 +1,7 @@
 import json
 import os
 import requests
+import sys
 from bs4 import BeautifulSoup
 
 
@@ -21,10 +22,11 @@ def update_useragents() -> bool:
         with open(os.path.join(ASSETS_DIR, "useragents.json"), "w") as f:
             json.dump(json_string, f)
 
+        print(f"{sys.argv[0]}: fetched useragent data")
         return True
 
     except Exception as e:
-        print(f"Error fetching useragent data: {e}")
+        print(f"{sys.argv[0]}: error fetching useragent data — {e}")
         return False
 
 
@@ -65,10 +67,11 @@ def update_referers() -> bool:
         with open(os.path.join(ASSETS_DIR, "referers.json"), "w") as f:
             json.dump(output, f)
 
+        print(f"{sys.argv[0]}: fetched referer data")
         return True
 
     except Exception as e:
-        print(f"Error fetching referer data: {e}")
+        print(f"{sys.argv[0]}: error fetching referer data — {e}")
         return False
 
 
@@ -123,14 +126,15 @@ def update_assets() -> bool:
             f.write("USERAGENT_WEIGHTS = " + str(useragent_weights))
             f.write("\n")
 
+        print(f"{sys.argv[0]}: saved useragent and referer JSON data to assets.py")
         return True
 
     except FileNotFoundError:
-        print("Error: JSON asset(s) missing")
+        print(f"{sys.argv[0]}: asset update error — JSON assets not found")
         return False
 
     except Exception as e:
-        print(f"{type(e)}: {e}")
+        print(f"{sys.argv[0]}: asset update error — {type(e)}: {e}")
         return False
 
 
@@ -139,9 +143,9 @@ def update_assets() -> bool:
     rf = update_referers()
     if ua and rf:
         assets_updated = update_assets()
-        if not assets_updated:
-            print("Failed to update assets.py")
+        if assets_updated:
+            sys.exit(0)
         else:
-            print("Update successful")
+            sys.exit(2)
     else:
-        print("Failed to update JSON assets")
+        sys.exit(3)
diff --git a/update.sh b/update.sh
index 6877482..3dabea9 100755
--- a/update.sh
+++ b/update.sh
@@ -1,20 +1,49 @@
 #!/bin/bash
+set -eu
 
-# Activates venv and runs ./update.py 
-# to get and save latest assets
+# 'update.sh' activates a virtual environment and runs 'update.py' 
+# to get and save the latest user-agent and referer assets from
+# external sources, then deactivates the virtual environment.
 
-source .venv/bin/activate
+# Usage:
+# "$ bash update.sh"
 
-if ! source .venv/bin/activate; then
-  echo "Error: couldn't activate venv."
-  echo "Create venv or update this script's venv path."
+this_script=$(basename "$0")
+python_script="update.py"
+venv_path=".venv/bin/activate"
+
+if [[ ! -f "${venv_path}" ]]; then
+  echo "${this_script}: error — virtual environment not found at ${venv_path}"
+  echo "  create a new virtual environment or update 'venv_path' in ${this_script}"
   exit 1
 fi
 
-python3 update.py
+source "${venv_path}"
 
-if [[ $? -eq 1 ]]; then
-  echo "Update failed — ensure BeautifulSoup4 is installed."
+if [[ ! -f "${python_script}" ]]; then
+  echo "${this_script}: error — ${python_script} not found"
+  deactivate
+  exit 1
 fi
 
+python3 "${python_script}"
+exit_code=$?
+
+case ${exit_code} in
+  0)
+    echo "${this_script}: asset update successful"
+    ;;
+  2)
+    echo "${this_script}: asset update failed — check file paths in ${python_script}"
+    ;;
+  3)
+    echo "${this_script}: asset update failed — ensure BeautifulSoup4 is"
+    echo "  installed and check source URLs in ${python_script} are live"
+    ;;
+  *)
+    echo "${this_script}: asset update failed with unexpected exit code ${exit_code}"
+    ;;
+esac
+
 deactivate
+exit "${exit_code}"