diff --git a/source/cell/cell.cpp b/source/cell/cell.cpp
index 83501f2d..a14304c6 100644
--- a/source/cell/cell.cpp
+++ b/source/cell/cell.cpp
@@ -825,11 +825,9 @@ std::string cell::to_string() const
         return nf.format(value<std::string>());
     case cell::type::boolean:
         return value<long double>() == 0.L ? "FALSE" : "TRUE";
-#ifdef WIN32
-    default:
-        throw xlnt::exception("unhandled");
-#endif
     }
+
+    return "";
 }
 
 bool cell::has_format() const
diff --git a/source/detail/xlsx_consumer.cpp b/source/detail/xlsx_consumer.cpp
index 75793e0b..a0de6a48 100644
--- a/source/detail/xlsx_consumer.cpp
+++ b/source/detail/xlsx_consumer.cpp
@@ -1551,26 +1551,10 @@ void xlsx_consumer::read_worksheet(const std::string &rel_id)
                     ws.row_properties(row_index).height = parser().attribute<long double>("ht");
                 }
 
-                skip_attribute("customHeight");
-
-                auto min_column = full_range.top_left().column_index();
-                auto max_column = full_range.bottom_right().column_index();
-
-                if (parser().attribute_present("spans"))
-                {
-                    std::string span_string = parser().attribute("spans");
-                    auto colon_index = span_string.find(':');
-
-                    if (colon_index != std::string::npos)
-                    {
-                        min_column = static_cast<column_t::index_t>(std::stoll(span_string.substr(0, colon_index)));
-                        max_column = static_cast<column_t::index_t>(std::stoll(span_string.substr(colon_index + 1)));
-                    }
-                }
-
                 skip_attributes({xml::qname(xmlns_x14ac, "dyDescent")});
                 skip_attributes({"customFormat", "s", "customFont", "hidden",
-                    "outlineLevel", "collapsed", "thickTop", "thickBot", "ph"});
+                    "outlineLevel", "collapsed", "thickTop", "thickBot", "ph",
+                    "spans", "customHeight"});
 
                 while (in_element(xml::qname(xmlns, "row")))
                 {
diff --git a/source/styles/border.cpp b/source/styles/border.cpp
index eec4b0c0..d53b86b5 100644
--- a/source/styles/border.cpp
+++ b/source/styles/border.cpp
@@ -25,6 +25,14 @@
 #include <xlnt/utils/exceptions.hpp>
 #include <xlnt/styles/border.hpp>
 
+#define EXCEPT_ON_UNHANDLED_SWITCH_CASE
+
+#ifdef EXCEPT_ON_UNHANDLED_SWITCH_CASE
+#define default_case(default_value) throw xlnt::exception("unhandled case");
+#else
+#define default_case(default_value) return default_value;
+#endif
+
 namespace xlnt {
 
 optional<xlnt::color> border::border_property::color() const
@@ -112,10 +120,9 @@ optional<border::border_property> border::side(border_side s) const
 	case border_side::vertical: return vertical_;
 	case border_side::horizontal: return horizontal_;
 	case border_side::diagonal: return diagonal_;
-#ifdef WIN32
-    default: throw xlnt::exception("unhandled");
-#endif
 	}
+
+    default_case(start_);
 }
 
 border &border::side(border_side s, const border_property &prop)
diff --git a/third-party/CMakeLists.txt b/third-party/CMakeLists.txt
index 78feb43f..5c6fd1cb 100644
--- a/third-party/CMakeLists.txt
+++ b/third-party/CMakeLists.txt
@@ -53,6 +53,8 @@ set(BOTAN
 
 if(MSVC)
     set_source_files_properties(${BOTAN} PROPERTIES COMPILE_FLAGS "/wd\"4244\" /wd\"4267\"")
+else()
+    set_source_files_properties(${BOTAN} PROPERTIES COMPILE_FLAGS "-Wno-deprecated-declarations")
 endif()
 
 if (CMAKE_SIZEOF_VOID_P EQUAL 8)