diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b80fc888c77972fab065270ad44b8bd969bbe241..b2099b57acade3c9e9f03d6c072223f029d99f2c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ image: alpine
 
 pages:
   script:
-  - apk update && apk add doxygen graphviz ttf-freefont
+  - apk update && apk add doxygen graphviz ttf-freefont epstopdf
   - doxygen docs/doxygen.conf
   - mv docs/html/ public/
   artifacts:
diff --git a/docs/doxygen.conf b/docs/doxygen.conf
index 0d7fe2a53d12293a0abdca8d7a3aaedd4ef48a02..47d4dfcc4797acd082b0a36b0851d856865fbfbd 100644
--- a/docs/doxygen.conf
+++ b/docs/doxygen.conf
@@ -568,7 +568,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = README.md src/ include/
+INPUT                  = LICENSE README.md src/ include/
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is