Index: utils/docker/debian8/build/Dockerfile
===================================================================
--- utils/docker/debian8/build/Dockerfile
+++ utils/docker/debian8/build/Dockerfile
@@ -23,7 +23,7 @@
     rm -rf /var/lib/apt/lists/*
 
 # Import public key required for verifying signature of cmake download.
-RUN gpg --keyserver hkp://pgp.mit.edu --recv 0x2D2CEF1034921684
+RUN gpg --keyserver hkp://pgp.mit.edu --recv 0xEC8FEF3A7BFB4EDA
 
 # Download, verify and install cmake version that can compile clang into /usr/local.
 # (Version in debian8 repos is is too old)