diff --git a/source/dub/dub.d b/source/dub/dub.d
index 8bcc557..d47632f 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -668,6 +668,8 @@
 		foreach(ps; m_packageSuppliers){
 			try {
 				pinfo = ps.fetchPackageRecipe(packageId, dep, (options & FetchOptions.usePrerelease) != 0);
+				if (pinfo.type == Json.Type.null_)
+					continue;
 				supplier = ps;
 				break;
 			} catch(Exception e) {
@@ -948,8 +950,15 @@
 	*/
 	auto searchPackages(string query)
 	{
-		return m_packageSuppliers.map!(ps => tuple(ps.description, ps.searchPackages(query))).array
-			.filter!(t => t[1].length);
+		Tuple!(string, PackageSupplier.SearchResult[])[] results;
+		foreach (ps; this.m_packageSuppliers) {
+			try
+				results ~= tuple(ps.description, ps.searchPackages(query));
+			catch (Exception e) {
+				logWarn("Searching %s for '%s' failed: %s", ps.description, query, e.msg);
+			}
+		}
+		return results.filter!(tup => tup[1].length);
 	}
 
 	/** Returns a list of all available versions (including branches) for a
@@ -1419,6 +1428,8 @@
 			if (rootpack == name) {
 				try {
 					auto desc = ps.fetchPackageRecipe(name, dep, prerelease);
+					if (desc.type == Json.Type.null_)
+						continue;
 					auto ret = new Package(desc);
 					m_remotePackages[key] = ret;
 					return ret;
diff --git a/source/dub/internal/utils.d b/source/dub/internal/utils.d
index 799755b..e1e2175 100644
--- a/source/dub/internal/utils.d
+++ b/source/dub/internal/utils.d
@@ -16,7 +16,7 @@
 
 // todo: cleanup imports.
 import core.thread;
-import std.algorithm : startsWith;
+import std.algorithm : canFind, startsWith;
 import std.array;
 import std.conv;
 import std.exception;
@@ -199,6 +199,38 @@
 	}
 }
 
+version(DubUseCurl) {
+	/++
+	 Exception thrown on HTTP request failures, e.g. 404 Not Found.
+	 +/
+	static if (__VERSION__ <= 2075) class HTTPStatusException : CurlException
+	{
+		/++
+		 Params:
+		 status = The HTTP status code.
+		 msg  = The message for the exception.
+		 file = The file where the exception occurred.
+		 line = The line number where the exception occurred.
+		 next = The previous exception in the chain of exceptions, if any.
+		 +/
+		@safe pure nothrow
+			this(
+				int status,
+				string msg,
+				string file = __FILE__,
+				size_t line = __LINE__,
+				Throwable next = null)
+		{
+			this.status = status;
+			super(msg, file, line, next);
+		}
+
+		int status; /// The HTTP status code
+	}
+} else version (Have_vibe_d_http) {
+	public import vibe.http.common : HTTPStatusException;
+}
+
 /**
 	Downloads a file from the specified URL.
 
@@ -211,10 +243,19 @@
 		auto conn = HTTP();
 		setupHTTPClient(conn);
 		logDebug("Storing %s...", url);
-		std.net.curl.download(url, filename, conn);
-		enforce(conn.statusLine.code < 400,
-			format("Failed to download %s: %s %s",
-				url, conn.statusLine.code, conn.statusLine.reason));
+		static if (__VERSION__ <= 2075)
+		{
+			try
+				std.net.curl.download(url, filename, conn);
+			catch (CurlException e)
+			{
+				if (e.msg.canFind("404"))
+					throw new HTTPStatusException(404, e.msg);
+				throw e;
+			}
+		}
+		else
+			std.net.curl.download(url, filename, conn);
 	} else version (Have_vibe_d) {
 		import vibe.inet.urltransfer;
 		vibe.inet.urltransfer.download(url, filename);
@@ -232,11 +273,19 @@
 		auto conn = HTTP();
 		setupHTTPClient(conn);
 		logDebug("Getting %s...", url);
-		auto ret = cast(ubyte[])get(url, conn);
-		enforce(conn.statusLine.code < 400,
-			format("Failed to GET %s: %s %s",
-				url, conn.statusLine.code, conn.statusLine.reason));
-		return ret;
+		static if (__VERSION__ <= 2075)
+		{
+			try
+				return cast(ubyte[])get(url, conn);
+			catch (CurlException e)
+			{
+				if (e.msg.canFind("404"))
+					throw new HTTPStatusException(404, e.msg);
+				throw e;
+			}
+		}
+		else
+			return cast(ubyte[])get(url, conn);
 	} else version (Have_vibe_d) {
 		import vibe.inet.urltransfer;
 		import vibe.stream.operations;
diff --git a/source/dub/packagesupplier.d b/source/dub/packagesupplier.d
index 0e2da45..cf12f3c 100644
--- a/source/dub/packagesupplier.d
+++ b/source/dub/packagesupplier.d
@@ -170,8 +170,10 @@
 
 	Version[] getVersions(string package_id)
 	{
+		auto md = getMetadata(package_id);
+		if (md.type == Json.Type.null_)
+			return null;
 		Version[] ret;
-		Json md = getMetadata(package_id);
 		foreach (json; md["versions"]) {
 			auto cur = Version(cast(string)json["version"]);
 			ret ~= cur;
@@ -184,6 +186,8 @@
 	{
 		import std.array : replace;
 		Json best = getBestPackage(packageId, dep, pre_release);
+		if (best.type == Json.Type.null_)
+			return;
 		auto vers = best["version"].get!string;
 		auto url = m_registryUrl ~ Path(PackagesPath~"/"~packageId~"/"~vers~".zip");
 		logDiagnostic("Downloading from '%s'", url);
@@ -209,7 +213,16 @@
 		logDebug("Downloading metadata for %s", packageId);
 		logDebug("Getting from %s", url);
 
-		auto jsonData = cast(string)download(url);
+		string jsonData;
+		try
+			jsonData = cast(string)download(url);
+		catch (HTTPStatusException e)
+		{
+			if (e.status != 404)
+				throw e;
+			logDebug("Package %s not found in %s: %s", packageId, description, e.msg);
+			return Json(null);
+		}
 		Json json = parseJsonString(jsonData, url.toString());
 		// strip readme data (to save size and time)
 		foreach (ref v; json["versions"])
@@ -223,12 +236,7 @@
 		auto url = m_registryUrl;
 		url.localURI = "/api/packages/search?q="~encodeComponent(query);
 		string data;
-		try
-			data = cast(string)download(url);
-		catch (Exception e) {
-			logWarn("Searching %s for '%s' failed: %s", m_registryUrl, query, e.msg);
-			return null;
-		}
+		data = cast(string)download(url);
 		import std.algorithm : map;
 		return data.parseJson.opt!(Json[])
 			.map!(j => SearchResult(j["name"].opt!string, j["description"].opt!string, j["version"].opt!string))
@@ -238,6 +246,8 @@
 	private Json getBestPackage(string packageId, Dependency dep, bool pre_release)
 	{
 		Json md = getMetadata(packageId);
+		if (md.type == Json.Type.null_)
+			return md;
 		Json best = null;
 		Version bestver;
 		foreach (json; md["versions"]) {