diff --git a/.circleci/config.yml b/.circleci/config.yml
index 30452f5ae..1c6e19728 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -820,7 +820,7 @@ jobs:
 
   t_ems_compile_ext_gnosis:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -835,7 +835,8 @@ jobs:
 
   t_ems_test_ext_gnosis:
     docker:
-      - image: circleci/node:10
+      # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
+      - image: circleci/node:12
     environment:
       TERM: xterm
     steps:
@@ -852,7 +853,7 @@ jobs:
 
   t_ems_compile_ext_gnosis_v2:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -867,7 +868,8 @@ jobs:
 
   t_ems_test_ext_gnosis_v2:
     docker:
-      - image: circleci/node:10
+      # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
+      - image: circleci/node:12
     environment:
       TERM: xterm
     steps:
@@ -884,7 +886,7 @@ jobs:
 
   t_ems_compile_ext_zeppelin:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -899,7 +901,7 @@ jobs:
 
   t_ems_test_ext_zeppelin:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -916,7 +918,7 @@ jobs:
 
   t_ems_compile_ext_colony:
     docker:
-      - image: circleci/node:12
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -935,7 +937,7 @@ jobs:
 
   t_ems_test_ext_colony:
     docker:
-      - image: circleci/node:12
+      - image: circleci/node:14
     environment:
       TERM: xterm
     steps:
@@ -956,6 +958,7 @@ jobs:
 
   t_ems_compile_ext_ens:
     docker:
+      # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
       - image: circleci/node:10
     environment:
       TERM: xterm
@@ -975,6 +978,7 @@ jobs:
 
   t_ems_test_ext_ens:
     docker:
+      # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
       - image: circleci/node:10
     environment:
       TERM: xterm