diff --git a/src/main/java/link/infra/packwiz/installer/UpdateManager.java b/src/main/java/link/infra/packwiz/installer/UpdateManager.java
index dd0ccb5..2b9e002 100644
--- a/src/main/java/link/infra/packwiz/installer/UpdateManager.java
+++ b/src/main/java/link/infra/packwiz/installer/UpdateManager.java
@@ -9,6 +9,7 @@ import java.net.URI;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
+import java.util.HashMap;
 import java.util.List;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CompletionService;
@@ -197,9 +198,18 @@ public class UpdateManager {
 			// TODO: throw exception
 		}
 
+		if (manifest.cachedFiles == null) {
+			manifest.cachedFiles = new HashMap<URI, ManifestFile.File>();
+		}
+
 		// TODO: progress bar
 		ConcurrentLinkedQueue<Exception> exceptionQueue = new ConcurrentLinkedQueue<Exception>();
-		List<IndexFile.File> newFiles = indexFile.files.stream().filter(f -> {
+		List<IndexFile.File> newFiles = indexFile.files.stream().map(f -> {
+			if (f.hashFormat == null || f.hashFormat.length() == 0) {
+				f.hashFormat = indexFile.hashFormat;
+			}
+			return f;
+		}).filter(f -> {
 			ManifestFile.File cachedFile = manifest.cachedFiles.get(f.file);
 			Object newHash;
 			try {
@@ -208,7 +218,7 @@ public class UpdateManager {
 				exceptionQueue.add(e);
 				return false;
 			}
-			return cachedFile == null || newHash.equals(cachedFile.hash);
+			return cachedFile == null || !newHash.equals(cachedFile.hash);
 		}).parallel().map(f -> {
 			try {
 				f.downloadMeta(indexFile, indexUri);
@@ -244,7 +254,7 @@ public class UpdateManager {
 					DownloadCompletion dc = new DownloadCompletion();
 					dc.file = f;
 
-					if (cachedFile.linkedFileHash != null && f.linkedFile != null) {
+					if (cachedFile != null && cachedFile.linkedFileHash != null && f.linkedFile != null) {
 						try {
 							if (cachedFile.linkedFileHash.equals(f.linkedFile.getHash())) {
 								// Do nothing, the file didn't change
@@ -268,8 +278,12 @@ public class UpdateManager {
 							hash = f.getHash();
 						}
 						if (fileSource.hashIsEqual(hash)) {
+							Files.createDirectories(Paths.get(opts.packFolder, f.getDestURI().toString()).getParent());
 							Files.copy(data.inputStream(), Paths.get(opts.packFolder, f.getDestURI().toString()), StandardCopyOption.REPLACE_EXISTING);
 						} else {
+							System.out.println("Invalid hash for " + f.getDestURI().toString());
+							System.out.println("Calculated: " + fileSource.getHash());
+							System.out.println("Expected:   " + hash);
 							dc.err = new Exception("Hash invalid!");
 						}
 						
@@ -313,13 +327,22 @@ public class UpdateManager {
 						ret.err = e;
 					}
 				}
+				manifest.cachedFiles.put(ret.file.file, newCachedFile);
 			}
 			// TODO: show errors properly?
 			String progress;
-			if (ret != null && ret.file != null) {
-				progress = "Downloaded " + ret.file.getName();
-			} else if (ret.err != null) {
-				progress = "Failed to download: " + ret.err.getMessage();
+			if (ret != null) {
+				if (ret.err != null) {
+					if (ret.file != null) {
+						progress = "Failed to download " + ret.file.getName() + ": " + ret.err.getMessage();
+					} else {
+						progress = "Failed to download: " + ret.err.getMessage();
+					}
+				} else if (ret.file != null) {
+					progress = "Downloaded " + ret.file.getName();
+				} else {
+					progress = "Failed to download, unknown reason";
+				}
 			} else {
 				progress = "Failed to download, unknown reason";
 			}
diff --git a/src/main/java/link/infra/packwiz/installer/metadata/IndexFile.java b/src/main/java/link/infra/packwiz/installer/metadata/IndexFile.java
index c7ac666..873ccc3 100644
--- a/src/main/java/link/infra/packwiz/installer/metadata/IndexFile.java
+++ b/src/main/java/link/infra/packwiz/installer/metadata/IndexFile.java
@@ -4,6 +4,7 @@ import java.net.URI;
 import java.nio.file.Paths;
 import java.util.List;
 
+import com.google.gson.annotations.JsonAdapter;
 import com.google.gson.annotations.SerializedName;
 import com.moandjiezana.toml.Toml;
 
@@ -19,6 +20,7 @@ public class IndexFile {
 	public List<File> files;
 	
 	public static class File {
+		@JsonAdapter(SpaceSafeURIParser.class)
 		public URI file;
 		@SerializedName("hash-format")
 		public String hashFormat;
diff --git a/src/main/java/link/infra/packwiz/installer/metadata/ModFile.java b/src/main/java/link/infra/packwiz/installer/metadata/ModFile.java
index 6b5c10c..118f5e7 100644
--- a/src/main/java/link/infra/packwiz/installer/metadata/ModFile.java
+++ b/src/main/java/link/infra/packwiz/installer/metadata/ModFile.java
@@ -3,6 +3,7 @@ package link.infra.packwiz.installer.metadata;
 import java.net.URI;
 import java.util.Map;
 
+import com.google.gson.annotations.JsonAdapter;
 import com.google.gson.annotations.SerializedName;
 
 import link.infra.packwiz.installer.UpdateManager.Options.Side;
@@ -17,6 +18,7 @@ public class ModFile {
 
 	public Download download;
 	public static class Download {
+		@JsonAdapter(SpaceSafeURIParser.class)
 		public URI url;
 		@SerializedName("hash-format")
 		public String hashFormat;
diff --git a/src/main/java/link/infra/packwiz/installer/metadata/PackFile.java b/src/main/java/link/infra/packwiz/installer/metadata/PackFile.java
index 0924cd2..97df666 100644
--- a/src/main/java/link/infra/packwiz/installer/metadata/PackFile.java
+++ b/src/main/java/link/infra/packwiz/installer/metadata/PackFile.java
@@ -3,6 +3,7 @@ package link.infra.packwiz.installer.metadata;
 import java.net.URI;
 import java.util.Map;
 
+import com.google.gson.annotations.JsonAdapter;
 import com.google.gson.annotations.SerializedName;
 
 public class PackFile {
@@ -10,6 +11,7 @@ public class PackFile {
 
 	public IndexFileLoc index;
 	public static class IndexFileLoc {
+		@JsonAdapter(SpaceSafeURIParser.class)
 		public URI file;
 		@SerializedName("hash-format")
 		public String hashFormat;
diff --git a/src/main/java/link/infra/packwiz/installer/metadata/SpaceSafeURIParser.java b/src/main/java/link/infra/packwiz/installer/metadata/SpaceSafeURIParser.java
new file mode 100644
index 0000000..670ce50
--- /dev/null
+++ b/src/main/java/link/infra/packwiz/installer/metadata/SpaceSafeURIParser.java
@@ -0,0 +1,31 @@
+package link.infra.packwiz.installer.metadata;
+
+import java.lang.reflect.Type;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+
+/**
+ * This class encodes spaces before parsing the URI, so the URI can actually be
+ * parsed.
+ */
+class SpaceSafeURIParser implements JsonDeserializer<URI> {
+
+	@Override
+	public URI deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+			throws JsonParseException {
+		String uriString = json.getAsString().replace(" ", "%20");
+		try {
+			return new URI(uriString);
+		} catch (URISyntaxException e) {
+			throw new JsonParseException("Failed to parse URI", e);
+		}
+	}
+
+	// TODO: replace this with a better solution?
+
+}
\ No newline at end of file