diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4996cb8..2ff539e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [0.4.1]  - 2023-06-05
+### Fixed
+- STL export bugfix
+
 ## [0.4.0] - 2023-05-03
 ### Added
 - (breaking) Support for many polygon formats (through GDAL)
diff --git a/src/io.cpp b/src/io.cpp
index e3c84dd..130e35a 100644
--- a/src/io.cpp
+++ b/src/io.cpp
@@ -384,9 +384,10 @@ void IO::output_stl(const OutputFeaturesPtr& allFeatures) {
             of.emplace_back();
             of.back().open(Config::get().outputFileName + "_" + Config::get().outputSurfaces[i] + ".stl");
         }
-        of.back() << "\nsolid " << Config::get().outputSurfaces[i];
+        of.back() << "solid " << Config::get().outputSurfaces[i];
         of.back() << fs[i];
         of.back() << "\nendsolid " << Config::get().outputSurfaces[i];
+        if (!Config::get().outputSeparately && i != fs.size() - 1) of.back() << "\n";
     }
     for (auto& f : of) f.close();
 }
diff --git a/src/main.cpp b/src/main.cpp
index b7d8bb7..a9c8d40 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -31,7 +31,7 @@
 
 #include  <boost/algorithm/string/predicate.hpp>
 
-std::string CITY4CFD_VERSION = "0.4.0";
+std::string CITY4CFD_VERSION = "0.4.1";
 
 void printWelcome() {
     auto logo{