diff --git a/celt/cwrs.c b/celt/cwrs.c
index 2fa9f89c..9722f0ac 100644
--- a/celt/cwrs.c
+++ b/celt/cwrs.c
@@ -74,7 +74,7 @@ int log2_frac(opus_uint32 val, int frac)
 /*Although derived separately, the pulse vector coding scheme is equivalent to
    a Pyramid Vector Quantizer \cite{Fis86}.
   Some additional notes about an early version appear at
-   http://people.xiph.org/~tterribe/notes/cwrs.html, but the codebook ordering
+   https://people.xiph.org/~tterribe/notes/cwrs.html, but the codebook ordering
    and the definitions of some terms have evolved since that was written.
 
   The conversion from a pulse vector to an integer index (encoding) and back
diff --git a/doc/trivial_example.c b/doc/trivial_example.c
index c65dfe01..047ca0a2 100644
--- a/doc/trivial_example.c
+++ b/doc/trivial_example.c
@@ -27,7 +27,7 @@
 /* This is meant to be a simple example of encoding and decoding audio
    using Opus. It should make it easy to understand how the Opus API
    works. For more information, see the full API documentation at:
-   http://www.opus-codec.org/docs/ */
+   https://www.opus-codec.org/docs/ */
 
 #include <stdlib.h>
 #include <errno.h>
diff --git a/include/opus_multistream.h b/include/opus_multistream.h
index 47e03900..3622e009 100644
--- a/include/opus_multistream.h
+++ b/include/opus_multistream.h
@@ -110,10 +110,10 @@ extern "C" {
   * packets produced by the encoder. Some basic information, such as packet
   * duration, can be computed without any special negotiation.
   *
-  * The format for multistream Opus packets is defined in the
-  * <a href="https://tools.ietf.org/html/draft-ietf-codec-oggopus">Ogg
-  * encapsulation specification</a> and is based on the self-delimited Opus
-  * framing described in Appendix B of <a href="https://tools.ietf.org/html/rfc6716">RFC 6716</a>.
+  * The format for multistream Opus packets is defined in
+  * <a href="https://tools.ietf.org/html/rfc7845">RFC 7845</a>
+  * and is based on the self-delimited Opus framing described in Appendix B of
+  * <a href="https://tools.ietf.org/html/rfc6716">RFC 6716</a>.
   * Normal Opus packets are just a degenerate case of multistream Opus packets,
   * and can be encoded or decoded with the multistream API by setting
   * <code>streams</code> to <code>1</code> when initializing the encoder or
diff --git a/opus.pc.in b/opus.pc.in
index e15c6fed..6946e7de 100644
--- a/opus.pc.in
+++ b/opus.pc.in
@@ -7,7 +7,7 @@ includedir=@includedir@
 
 Name: Opus
 Description: Opus IETF audio codec (@PC_BUILD@ build)
-URL: http://opus-codec.org/
+URL: https://opus-codec.org/
 Version: @VERSION@
 Requires:
 Conflicts:
diff --git a/silk/sort.c b/silk/sort.c
index 8670dbdd..7187c9ef 100644
--- a/silk/sort.c
+++ b/silk/sort.c
@@ -33,7 +33,7 @@ POSSIBILITY OF SUCH DAMAGE.
 /* Best case:  O(n)   for an already sorted array            */
 /* Worst case: O(n^2) for an inversely sorted array          */
 /*                                                           */
-/* Shell short:    http://en.wikipedia.org/wiki/Shell_sort   */
+/* Shell short:    https://en.wikipedia.org/wiki/Shell_sort  */
 
 #include "SigProc_FIX.h"