diff --git a/README b/README
index f69880ea8db799341e2fcf22152400778d4984ca..c5022a59d222e4c0e850b6f9f2e04341b7af7d48 100644
--- a/README
+++ b/README
@@ -52,5 +52,5 @@ Porting:
      
 Contact:
 
-     Send questions, comments and bug reports to <http://mpimet.mpg.de/cdi>
+     Send questions, comments and bug reports to <https://mpimet.mpg.de/cdi>
 
diff --git a/configure.ac b/configure.ac
index bb0fafd32da0fee025f34df973791b8eaa33c3aa..4f7648bc8b3565dfa8477c281ed22b3d872ce1c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@
 AC_PREREQ([2.69])
 LT_PREREQ([2.4.6])
 
-AC_INIT([cdi], [1.9.8rc2], [http://mpimet.mpg.de/cdi])
+AC_INIT([cdi], [1.9.8rc2], [https://mpimet.mpg.de/cdi])
 
 AC_DEFINE_UNQUOTED(CDI, ["$PACKAGE_VERSION"], [CDI version])
 
diff --git a/doc/tex/bib.tex b/doc/tex/bib.tex
index ca61769f8a00c3663144d58b9da84a42ef66eb03..6f186247cefa824ad6ab4c435f752d8ac7652037 100644
--- a/doc/tex/bib.tex
+++ b/doc/tex/bib.tex
@@ -8,10 +8,10 @@
 
 
 \bibitem[ECHAM]{ECHAM} \ \\
-  \href{http://www.mpimet.mpg.de/wissenschaft/publikationen/reports.html}
+  \href{https://www.mpimet.mpg.de/fileadmin/publikationen/Reports/max_scirep_349.pdf}
        {The atmospheric general circulation model ECHAM5},
   from the
-  \href{http://www.mpimet.mpg.de}
+  \href{https://www.mpimet.mpg.de}
        {Max Planck Institute for Meteorologie}
 
 
@@ -38,14 +38,14 @@
 \bibitem[MPIOM]{MPIOM} \ \\
   The ocean model MPIOM,
   from the
-  \href{http://www.mpimet.mpg.de}
+  \href{https://www.mpimet.mpg.de}
        {Max Planck Institute for Meteorologie}
 
 
 \bibitem[REMO]{REMO} \ \\
   The regional climate model REMO,
   from the
-  \href{http://www.mpimet.mpg.de}
+  \href{https://www.mpimet.mpg.de}
        {Max Planck Institute for Meteorologie}
 
 \end{thebibliography}
diff --git a/doc/tex/intro.tex b/doc/tex/intro.tex
index ea8797325b01cdb5f9bba8b91a6b41b15d3d25a1..45421645ec67800aab4bb9b9be751b20df97789c 100644
--- a/doc/tex/intro.tex
+++ b/doc/tex/intro.tex
@@ -2,7 +2,7 @@
 The interface is independent from a specific data format and has a C and Fortran API.
 {\CDI} was developed for a fast and machine independent access to GRIB
 and NetCDF datasets with the same interface.
-The local \href{http://www.mpimet.mpg.de/}{MPI-MET} data formats SERVICE, EXTRA and 
+The local \href{https://www.mpimet.mpg.de/}{MPI-MET} data formats SERVICE, EXTRA and 
 IEG are also supported.
 
 
diff --git a/src/cdf.c b/src/cdf.c
index 3567014dee65a33b4726f9e388e83fc0fa6070de..483e57b24fb1ecd8b14b3e4b9a8fc19a505b5c0a 100644
--- a/src/cdf.c
+++ b/src/cdf.c
@@ -80,7 +80,7 @@ void cdfComment(int ncid)
 	strcat(comment, "??");
       else
 	strcat(comment, libvers);
-      strcat(comment, " (http://mpimet.mpg.de/cdi)");
+      strcat(comment, " (https://mpimet.mpg.de/cdi)");
     }
 
   cdf_put_att_text(ncid, NC_GLOBAL, "CDI", strlen(comment), comment);