diff --git a/app/dock_docker.py b/app/dock_docker.py
index e1b17d1..54f413c 100644
--- a/app/dock_docker.py
+++ b/app/dock_docker.py
@@ -26,9 +26,9 @@ def email(zipArchive):
     
     msg.attach(MIMEText(body, 'plain')) 
     filename = "Curie_Web_Results_Job_ID_" + str(jobID) + ".zip"
-    attachment = open((str(zipArchive) + ".zip"), "rb") 
     p = MIMEBase('application', 'octet-stream') 
-    p.set_payload((attachment).read()) 
+    with open((str(zipArchive) + ".zip"), "rb") as attachment:
+        p.set_payload((attachment).read()) 
     encoders.encode_base64(p) 
     p.add_header('Content-Disposition', "attachment; filename= %s" % filename) 
     msg.attach(p) 
@@ -78,15 +78,12 @@ with tempfile.TemporaryDirectory() as directory:
 #    copy(t,os.getcwd())
 #    copy(r,os.getcwd())
 #    copy(c, os.getcwd())
-    file = open(receptor_name,"wb")
-    file.write(targetB)
-    file.close()
-    file = open(ligand_name,"wb")
-    file.write(ligandB)
-    file.close()
-    file = open("config.txt","wb")
-    file.write(configB)
-    file.close()
+    with open(receptor_name,"wb") as file:
+        file.write(targetB)
+    with open(ligand_name,"wb") as file:
+        file.write(ligandB)
+    with open("config.txt","wb") as file:
+        file.write(configB)
     os.system("docker run --rm -v ${PWD}:/results -w /results -u $(id -u ${USER}):$(id -g ${USER}) navanchauhan/curie-cli -r %s -l %s  -c config.txt -dpi" % (receptor_name,ligand_name))
     #copy("report.pdf",f)
     z = "Curie_Web_Result_"+str(jobID)