diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
new file mode 100644
index 0000000..f9d3c4e
Binary files /dev/null and b/.idea/caches/build_file_checksums.ser differ
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000..30aa626
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,29 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <Objective-C-extensions>
+      <file>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Import" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Macro" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Typedef" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Enum" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Constant" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Global" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Struct" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="FunctionPredecl" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Function" />
+      </file>
+      <class>
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Property" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="Synthesize" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InitMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="StaticMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="InstanceMethod" />
+        <option name="com.jetbrains.cidr.lang.util.OCDeclarationKind" value="DeallocMethod" />
+      </class>
+      <extensions>
+        <pair source="cpp" header="h" fileNamingConvention="NONE" />
+        <pair source="c" header="h" fileNamingConvention="NONE" />
+      </extensions>
+    </Objective-C-extensions>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/app/src/main/java/us/spotco/malwarescanner/Database.java b/app/src/main/java/us/spotco/malwarescanner/Database.java
index dbb2514..1844da1 100644
--- a/app/src/main/java/us/spotco/malwarescanner/Database.java
+++ b/app/src/main/java/us/spotco/malwarescanner/Database.java
@@ -24,14 +24,17 @@ import android.widget.TextView;
 
 import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.FileReader;
+import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.InetSocketAddress;
 import java.net.Proxy;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.zip.GZIPInputStream;
 
 class Database {
 
@@ -79,33 +82,33 @@ class Database {
 
         prefs = context.getSharedPreferences(BuildConfig.APPLICATION_ID, Context.MODE_PRIVATE);
         if (prefs.getBoolean("SIGNATURES_EXTENDED", false)) {
-            signatureDatabases.add(new SignatureDatabase(baseURL + "bofhland_malware_attach.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "crdfam.clamav.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "doppelstern.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "hackingteam.hsb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "malware.expert.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "malwarehash.hsb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "porcupine.hsb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "rfxn.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "rogue.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "spamattach.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "spamimg.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow.attachments.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_bad_cw.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_extended_malware.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_malware.hdb"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "bofhland_malware_attach.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "crdfam.clamav.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "doppelstern.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "hackingteam.hsb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "malware.expert.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "malwarehash.hsb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "porcupine.hsb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "rfxn.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "rogue.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "spamattach.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "spamimg.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow.attachments.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_bad_cw.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_extended_malware.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "winnow_malware.hdb.gz"));
         }
         if (prefs.getBoolean("SIGNATURES_CLAMAV-MAIN", false)) {
-            signatureDatabases.add(new SignatureDatabase(baseURL + "main.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "main.hsb"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "main.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "main.hsb.gz"));
         }
         if (prefs.getBoolean("SIGNATURES_CLAMAV-DAILY", false)) {
-            signatureDatabases.add(new SignatureDatabase(baseURL + "daily.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "daily.hsb"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "daily.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "daily.hsb.gz"));
         }
         if (prefs.getBoolean("SIGNATURES_CLAMAV-ANDROID", true)) {
-            signatureDatabases.add(new SignatureDatabase(baseURL + "Android.hdb"));
-            signatureDatabases.add(new SignatureDatabase(baseURL + "Android.hsb"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "Android.hdb.gz"));
+            signatureDatabases.add(new SignatureDatabase(baseURL + "Android.hsb.gz"));
         }
     }
 
@@ -119,22 +122,20 @@ class Database {
             for (SignatureDatabase database : signatureDatabases) {
                 File databaseLocation = new File(databasePath + "/" + database.getName());
                 if (databaseLocation.exists()) {
-                    if (database.getName().contains(".hdb")) {//.hdb format: md5, size, name
-                        try {
-                            BufferedReader reader = new BufferedReader(new FileReader(databaseLocation));
-                            String line;
+                    try {
+                        BufferedReader reader;
+                        if(databaseLocation.getName().endsWith(".gz")) {
+                            reader = new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(databaseLocation))));
+                        } else {
+                            reader = new BufferedReader(new FileReader(databaseLocation));
+                        }
+                        String line;
+                        if (database.getName().contains(".hdb")) {//.hdb format: md5, size, name
                             while ((line = reader.readLine()) != null) {
                                 String[] lineS = line.split(":");
                                 signaturesMD5.put(lineS[0].substring(0, Utils.MAX_HASH_LENGTH), lineS[2]);
                             }
-                            reader.close();
-                        } catch (Exception e) {
-                            e.printStackTrace();
-                        }
-                    } else if (database.getName().contains(".hsb")) {//.hsb format: sha256, size, name
-                        try {
-                            BufferedReader reader = new BufferedReader(new FileReader(databaseLocation));
-                            String line;
+                        } else if (database.getName().contains(".hsb")) {//.hsb format: sha256, size, name
                             while ((line = reader.readLine()) != null) {
                                 String[] lineS = line.split(":");
                                 if (lineS[0].length() == 32) {
@@ -143,10 +144,10 @@ class Database {
                                     signaturesSHA256.put(lineS[0].substring(0, Utils.MAX_HASH_LENGTH), lineS[2]);
                                 }
                             }
-                            reader.close();
-                        } catch (Exception e) {
-                            e.printStackTrace();
                         }
+                        reader.close();
+                    } catch(Exception e) {
+                        e.printStackTrace();
                     }
                 }
             }