diff --git a/libappimage-1.0.3-gcc-10.patch b/libappimage-1.0.3-gcc-10.patch
new file mode 100644
index 0000000..d715544
--- /dev/null
+++ b/libappimage-1.0.3-gcc-10.patch
@@ -0,0 +1,50 @@
+diff --git a/src/libappimage/utils/StringSanitizer.cpp b/src/libappimage/utils/StringSanitizer.cpp
+index fee9f7d..521d82e 100644
+--- a/src/libappimage/utils/StringSanitizer.cpp
++++ b/src/libappimage/utils/StringSanitizer.cpp
+@@ -13,6 +13,20 @@ std::string StringSanitizer::sanitizeForPath() {
+     std::vector<std::string::value_type> buffer{};
+     buffer.reserve(input_.size());
+ 
++    // these three lists can be used to compose alphabets for sanitization
++    static constexpr std::initializer_list<std::string::value_type> asciiLetters_ = {
++        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
++        'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
++        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
++        'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
++    };
++    static constexpr std::initializer_list<std::string::value_type> asciiDigits_ = {
++        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
++    };
++    static constexpr std::initializer_list<std::string::value_type> pathSafeChars_ = {
++        '.', '-', '_'
++    };
++
+     // first of all, we compose an alphabet of safe characters
+     // all characters not contained in this alphabet will be replaced by some safe character, e.g., an underscore (_)
+     std::vector<std::string::value_type> safeAlphabet{asciiDigits_.size() + asciiLetters_.size() + pathSafeChars_.size()};
+diff --git a/src/libappimage/utils/StringSanitizer.h b/src/libappimage/utils/StringSanitizer.h
+index 5301ec1..9919ed6 100644
+--- a/src/libappimage/utils/StringSanitizer.h
++++ b/src/libappimage/utils/StringSanitizer.h
+@@ -10,20 +10,6 @@ class StringSanitizer {
+ private:
+     std::string input_;
+ 
+-    // these three lists can be used to compose alphabets for sanitization
+-    static constexpr std::initializer_list<std::string::value_type> asciiLetters_ = {
+-        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
+-        'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+-        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
+-        'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+-    };
+-    static constexpr std::initializer_list<std::string::value_type> asciiDigits_ = {
+-        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+-    };
+-    static constexpr std::initializer_list<std::string::value_type> pathSafeChars_ = {
+-        '.', '-', '_'
+-    };
+-
+ public:
+     /**
+      * Default constructor.
diff --git a/libappimage.spec b/libappimage.spec
index df03efe..c7b2054 100644
--- a/libappimage.spec
+++ b/libappimage.spec
@@ -1,14 +1,14 @@
 Name:          libappimage
-Version:       1.0.2
-Release:       2mamba
+Version:       1.0.3
+Release:       1mamba
 Summary:       Implements functionality for dealing with AppImage files
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://appimage.org
-## GITSOURCE https://github.com/AppImage/libappimage.git v1.0.2
 Source:        https://github.com/AppImage/libappimage.git/v%{version}/libappimage-%{version}.tar.bz2
+Patch0:        libappimage-1.0.3-gcc-10.patch
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -30,8 +30,7 @@ Implements functionality for dealing with AppImage files.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
-## note: you can add this requirement if .pc files are provided by this package
-#Requires:      pkg-config
+Requires:      pkg-config
 
 %description devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -40,13 +39,11 @@ This package contains libraries and header files for developing applications tha
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 %cmake -d build \
-\
-%ifarch arm
-   -DCMAKE_CXX_FLAGS="%{optflags} -Wno-narrowing"
-%endif
+   -DCMAKE_CXX_FLAGS="%{optflags} -Wno-narrowing -fcommon"
 
 %make
 
@@ -84,6 +81,9 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Sun Dec 27 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.3-1mamba
+- update to 1.0.3
+
 * Tue Nov 12 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.2-2mamba
 - added debug package