diff --git a/Dockerfile.centos7 b/Dockerfile.centos7
index 458d0dbc..61ffacaa 100644
--- a/Dockerfile.centos7
+++ b/Dockerfile.centos7
@@ -17,7 +17,7 @@ RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo \
 RUN ln -sf /usr/bin/cmake3 /usr/bin/cmake
 
 # Download Bison
-RUN wget https://ftp.gnu.org/gnu/bison/bison-3.8.2.tar.gz && \
+RUN wget https://ftpmirror.gnu.org/gnu/bison/bison-3.8.2.tar.gz && \
     tar -xvf bison-3.8.2.tar.gz && \
     rm bison-3.8.2.tar.gz
 
@@ -42,7 +42,8 @@ RUN source /opt/rh/devtoolset-11/enable && \
     make install
 
 # Download TCL
-RUN wget http://prdownloads.sourceforge.net/tcl/tcl8.6.16-src.tar.gz && \
+RUN wget https://sourceforge.net/projects/tcl/files/Tcl/8.6.16/tcl8.6.16-src.tar.gz/download \
+        -O tcl8.6.16-src.tar.gz && \
     tar -xvf tcl8.6.16-src.tar.gz && \
     rm tcl8.6.16-src.tar.gz