diff --git a/Dockerfile b/Dockerfile
index 37bfaa2a..86c3d089 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM alpine:3.13 AS base
 ARG asciidoctor_version=2.0.15
 ARG asciidoctor_confluence_version=0.0.2
 ARG asciidoctor_pdf_version=1.5.4
-ARG asciidoctor_diagram_version=2.1.0
+ARG asciidoctor_diagram_version=2.1.2
 ARG asciidoctor_epub3_version=1.5.1
 ARG asciidoctor_fb2_version=0.5.1
 ARG asciidoctor_mathematical_version=0.3.5
diff --git a/tests/env_vars.yml b/tests/env_vars.yml
index d2af88e3..587b8c37 100644
--- a/tests/env_vars.yml
+++ b/tests/env_vars.yml
@@ -3,10 +3,10 @@
 ASCIIDOCTOR_VERSION: 2.0.15
 ASCIIDOCTOR_CONFLUENCE_VERSION: 0.0.2
 ASCIIDOCTOR_PDF_VERSION: 1.5.4
-ASCIIDOCTOR_DIAGRAM_VERSION: 2.1.0
+ASCIIDOCTOR_DIAGRAM_VERSION: 2.1.2
 ASCIIDOCTOR_EPUB3_VERSION: 1.5.1
 ASCIIDOCTOR_FB2_VERSION: 0.5.1
 ASCIIDOCTOR_MATHEMATICAL_VERSION: 0.3.5
-ASCIIDOCTOR_REVEALJS_VERSION: 4.0.1
+ASCIIDOCTOR_REVEALJS_VERSION: 4.1.0
 KRAMDOWN_ASCIIDOC_VERSION: 1.0.1
 ASCIIDOCTOR_BIBTEX_VERSION: 0.8.0
diff --git a/tests/test_suite.bats b/tests/test_suite.bats
index 16c976f1..d295c12c 100644
--- a/tests/test_suite.bats
+++ b/tests/test_suite.bats
@@ -48,7 +48,8 @@ teardown() {
 }
 
 @test "asciidoctor-revealjs is callable without error" {
-  docker run -t --rm "${DOCKER_IMAGE_NAME_TO_TEST}" asciidoctor-revealjs -v
+  docker run -t --rm "${DOCKER_IMAGE_NAME_TO_TEST}" asciidoctor-revealjs -v \
+    | grep "${ASCIIDOCTOR_REVEALJS_VERSION}"
 }
 
 @test "make is installed and in the path" {