diff --git a/source/dub/project.d b/source/dub/project.d
index 395b011..cc358c2 100644
--- a/source/dub/project.d
+++ b/source/dub/project.d
@@ -171,8 +171,8 @@
 		m_main = new Package(m_root);
 		m_main.warnOnSpecialCompilerFlags();
 		if (m_main.name != m_main.name.toLower()) {
-			logWarn("Package names should always be lower case, please change from '%s' to '%s'!",
-				m_main.name, m_main.name.toLower());
+			logWarn(`DUB package names should always be lower case, please change to {"name": "%s"}. You can use {"targetName": "%s"} to keep the current executable name.`,
+				m_main.name.toLower(), m_main.name);
 		}
 
 		// TODO: compute the set of mutual dependencies first
diff --git a/source/dub/utils.d b/source/dub/utils.d
index 90f06d8..4c9332d 100644
--- a/source/dub/utils.d
+++ b/source/dub/utils.d
@@ -15,12 +15,13 @@
 import dub.version_;
 
 // todo: cleanup imports.
-import std.algorithm;
+import std.algorithm : startsWith;
 import std.array;
 import std.conv;
 import std.exception;
 import std.file;
 import std.net.curl;
+import std.string;
 import std.typecons;
 import std.zip;
 
@@ -121,6 +122,13 @@
 	auto conn = HTTP();
 	static if( is(typeof(&conn.verifyPeer)) )
 		conn.verifyPeer = false;
-	conn.addRequestHeader("User-Agent", "dub/"~dubVersion~" (std.net.curl; +https://github.com/rejectedsoftware/dub)");
+
+	// convert version string to valid SemVer format
+	auto verstr = dubVersion;
+	if (verstr.startsWith("v")) verstr = verstr[1 .. $];
+	auto idx = verstr.indexOf("-");
+	if (idx >= 0) verstr = verstr[0 .. idx] ~ "+" ~ verstr[idx+1 .. $].split("-").join(".");
+
+	conn.addRequestHeader("User-Agent", "dub/"~verstr~" (std.net.curl; +https://github.com/rejectedsoftware/dub)");
 	return conn;
 }
\ No newline at end of file