diff --git a/groups/231.native_packages_etc.group b/groups/231.native_packages_etc.group
index 5d73fab..61620c4 100644
--- a/groups/231.native_packages_etc.group
+++ b/groups/231.native_packages_etc.group
@@ -254,7 +254,7 @@ zstd")";
 : ${PKG_POTRACE_DEPENDS:="libz"};
 : ${PKG_POTRACE_SHA256SUM:=be8248a17dedd6ccbaab2fcc45835bb0502d062e40fbded3bc56028ce5eb7acc};
 : ${PKG_POTRACE_VERSION:=1.16};
-: ${PKG_POTRACE_URL:=http://potrace.sourceforge.net/download/${PKG_POTRACE_VERSION}/potrace-${PKG_POTRACE_VERSION}.tar.gz};
+: ${PKG_POTRACE_URL:=https://ftp.osuosl.org/pub/blfs/conglomeration/potrace/potrace-${PKG_POTRACE_VERSION}.tar.gz};
 : ${PKG_PROCPS_NG_DEPENDS:="ncurses ncursesw"};
 : ${PKG_PROCPS_NG_SHA256SUM:=440af4845fee9f55b721aa456f88259668465ddb37168ea1e2d2ef195f55bbc4};
 : ${PKG_PROCPS_NG_VERSION:=3.3.15};
diff --git a/groups/251.native_packages_lib.group b/groups/251.native_packages_lib.group
index 4c1a8e8..2567bd8 100644
--- a/groups/251.native_packages_lib.group
+++ b/groups/251.native_packages_lib.group
@@ -16,7 +16,7 @@ libxslt libz libzip wolfssl")";
 : ${PKG_GLIB_CONFIGURE_ARGS_EXTRA:="--disable-dtrace --disable-libelf --disable-libmount --with-python=${PREFIX}/bin/python3"};
 : ${PKG_LAME_SHA256SUM:=ddfe36cab873794038ae2c1210557ad34857a4b6bdc515785d1da9e175b1da1e};
 : ${PKG_LAME_VERSION:=3.100};
-: ${PKG_LAME_URL:=https://sourceforge.mirrorservice.org/l/la/lame/lame/3.100/lame-${PKG_LAME_VERSION}.tar.gz};
+: ${PKG_LAME_URL:=https://ftp.osuosl.org/pub/blfs/conglomeration/lame/lame-${PKG_LAME_VERSION}.tar.gz};
 : ${PKG_LAME_CONFIGURE_ARGS_EXTRA:="--enable-nasm"};
 : ${PKG_LAME_LDFLAGS_CONFIGURE_EXTRA:="-Wl,--as-needed -ltinfo -Wl,--no-as-needed"};
 : ${PKG_LIBARCHIVE_SHA256SUM:=ee1e749213c108cb60d53147f18c31a73d6717d7e3d2481c157e1b34c881ea39};
@@ -127,7 +127,7 @@ libxslt libz libzip wolfssl")";
 : ${PKG_LIBPNG_DEPENDS:="libz"};
 : ${PKG_LIBPNG_SHA256SUM:=505e70834d35383537b6491e7ae8641f1a4bed1876dbfe361201fc80868d88ca};
 : ${PKG_LIBPNG_VERSION:=1.6.37};
-: ${PKG_LIBPNG_URL:=https://sourceforge.mirrorservice.org/l/li/libpng/libpng16/${PKG_LIBPNG_VERSION}/libpng-${PKG_LIBPNG_VERSION}.tar.xz};
+: ${PKG_LIBPNG_URL:=https://ftp.osuosl.org/pub/blfs/conglomeration/libpng/libpng-${PKG_LIBPNG_VERSION}.tar.xz};
 : ${PKG_LIBREDWG_SHA256SUM:=c25bbab29e7814663a203c38df8cbcce850d0b003a7132cf3f849429468ca7ed};
 : ${PKG_LIBREDWG_VERSION:=0.11};
 : ${PKG_LIBREDWG_URL:=https://ftp.gnu.org/gnu/libredwg/libredwg-${PKG_LIBREDWG_VERSION}.tar.xz};
diff --git a/groups/261.native_packages_x11.group b/groups/261.native_packages_x11.group
index 8bb03e7..6898165 100644
--- a/groups/261.native_packages_x11.group
+++ b/groups/261.native_packages_x11.group
@@ -61,7 +61,7 @@ xtrans xwd xwin")";
 : ${PKG_GLEW_DEPENDS:="libX11 mesa"};
 : ${PKG_GLEW_SHA256SUM:=04de91e7e6763039bc11940095cd9c7f880baba82196a7765f727ac05a993c95};
 : ${PKG_GLEW_VERSION:=2.1.0};
-: ${PKG_GLEW_URL:=http://sourceforge.mirrorservice.org/g/gl/glew/glew/${PKG_GLEW_VERSION}/glew-${PKG_GLEW_VERSION}.tgz};
+: ${PKG_GLEW_URL:=https://ftp.osuosl.org/pub/blfs/conglomeration/glew/glew-${PKG_GLEW_VERSION}.tgz};
 : ${PKG_GLEW_BUILD_STEPS_DISABLE:=install_make};
 : ${PKG_GLEW_CFLAGS_BUILD_EXTRA:=-Iinclude};
 : ${PKG_GLEW_INSTALL_FILES:="../glew-${PKG_GLEW_VERSION}/lib/libGLEW.lib.a=lib/ ../glew-${PKG_GLEW_VERSION}/lib/libGLEW.so=lib/ ../glew-${PKG_GLEW_VERSION}/lib/libGLEW.so.${PKG_GLEW_VERSION}=lib/ ../glew-${PKG_GLEW_VERSION}/lib/libGLEW.so.${PKG_GLEW_VERSION%.*}=lib/ ../glew-${PKG_GLEW_VERSION}/lib/libGLEW.a=lib/ ../glew-${PKG_GLEW_VERSION}/bin/glewinfo=bin/ ../glew-${PKG_GLEW_VERSION}/bin/visualinfo=bin/"};