diff --git a/.blueprints/Dockerfile.blueprint b/.blueprints/Dockerfile.blueprint
index ef261745..c46a27d2 100644
--- a/.blueprints/Dockerfile.blueprint
+++ b/.blueprints/Dockerfile.blueprint
@@ -17,6 +17,17 @@ RUN echo "deb http://httpredir.debian.org/debian/ stretch main contrib non-free"
     ln -s /usr/bin/pdftk /usr/local/bin/pdftk &&\
     ln -s /usr/bin/unoconv /usr/local/bin/unoconv
 
+RUN apt-get install -y curl gnupg &&\
+    curl -sL https://deb.nodesource.com/setup_8.x | bash - &&\
+    apt-get update &&\
+    apt-get install -y nodejs
+
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - &&\
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list &&\
+    apt-get update &&\
+    apt-get install -y yarn bzip2 &&\
+    yarn global add markdown-pdf --prefix /usr/local
+
 # |--------------------------------------------------------------------------
 # | Gotenberg
 # |--------------------------------------------------------------------------
@@ -41,11 +52,11 @@ RUN go get -d -v ./...
 ENTRYPOINT [".ci/docker-entrypoint.sh"]
 {{- else }}
 
-COPY .build/gotenberg /usr/bin/gotenberg
+COPY .ci/gotenberg /usr/bin/gotenberg
 RUN ln -s /usr/bin/gotenberg /usr/local/bin/gotenberg
 
 WORKDIR /gotenberg
-COPY .build/gotenberg.yml /gotenberg/gotenberg.yml
+COPY .ci/gotenberg.yml /gotenberg/gotenberg.yml
 
 EXPOSE 3000
 CMD ["gotenberg"]
diff --git a/.build/gotenberg b/.build/gotenberg
deleted file mode 100755
index 4b39e207..00000000
Binary files a/.build/gotenberg and /dev/null differ
diff --git a/.ci/docker-entrypoint.sh b/.ci/docker-entrypoint.sh
index 12a5b00b..404e24d0 100755
--- a/.ci/docker-entrypoint.sh
+++ b/.ci/docker-entrypoint.sh
@@ -22,7 +22,7 @@ else
 fi
 
 # Builds the Linux binary.
-env GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "-X main.version=${VERSION}" && mv gotenberg .build/;
+env GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "-X main.version=${VERSION}" && mv gotenberg .ci/;
 
 # Bye!
 exit 0;
\ No newline at end of file
diff --git a/.build/gotenberg.yml b/.ci/gotenberg.yml
similarity index 100%
rename from .build/gotenberg.yml
rename to .ci/gotenberg.yml
diff --git a/.gitignore b/.gitignore
index 2e1b0fb9..39d8e46e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .DS_Store
 .ci/coverage.txt
-.vscode
\ No newline at end of file
+.ci/gotenberg
+.vscode
diff --git a/Dockerfile b/Dockerfile
index cfa4f3da..8d0fa13e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,17 @@ RUN echo "deb http://httpredir.debian.org/debian/ stretch main contrib non-free"
     ln -s /usr/bin/pdftk /usr/local/bin/pdftk &&\
     ln -s /usr/bin/unoconv /usr/local/bin/unoconv
 
+RUN apt-get install -y curl gnupg &&\
+    curl -sL https://deb.nodesource.com/setup_8.x | bash - &&\
+    apt-get update &&\
+    apt-get install -y nodejs
+
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - &&\
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list &&\
+    apt-get update &&\
+    apt-get install -y yarn bzip2 &&\
+    yarn global add markdown-pdf --prefix /usr/local
+
 # |--------------------------------------------------------------------------
 # | Gotenberg
 # |--------------------------------------------------------------------------
@@ -24,11 +35,11 @@ RUN echo "deb http://httpredir.debian.org/debian/ stretch main contrib non-free"
 # | All Gotenberg related stuff.
 # |
 
-COPY .build/gotenberg /usr/bin/gotenberg
+COPY .ci/gotenberg /usr/bin/gotenberg
 RUN ln -s /usr/bin/gotenberg /usr/local/bin/gotenberg
 
 WORKDIR /gotenberg
-COPY .build/gotenberg.yml /gotenberg/gotenberg.yml
+COPY .ci/gotenberg.yml /gotenberg/gotenberg.yml
 
 EXPOSE 3000
 CMD ["gotenberg"]
\ No newline at end of file
diff --git a/Dockerfile.ci b/Dockerfile.ci
index 38107c73..fb0553b2 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -17,6 +17,17 @@ RUN echo "deb http://httpredir.debian.org/debian/ stretch main contrib non-free"
     ln -s /usr/bin/pdftk /usr/local/bin/pdftk &&\
     ln -s /usr/bin/unoconv /usr/local/bin/unoconv
 
+RUN apt-get install -y curl gnupg &&\
+    curl -sL https://deb.nodesource.com/setup_8.x | bash - &&\
+    apt-get update &&\
+    apt-get install -y nodejs
+
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - &&\
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list &&\
+    apt-get update &&\
+    apt-get install -y yarn bzip2 &&\
+    yarn global add markdown-pdf --prefix /usr/local
+
 # |--------------------------------------------------------------------------
 # | Gotenberg
 # |--------------------------------------------------------------------------
diff --git a/app/converter/file/file.go b/app/converter/file/file.go
index 7e59889e..054fc73d 100644
--- a/app/converter/file/file.go
+++ b/app/converter/file/file.go
@@ -34,6 +34,7 @@ const (
 // filesTypes associates a file extension with its file kind counterpart.
 var filesTypes = map[string]Type{
 	".pdf":  PDFType,
+	".htm":  HTMLType,
 	".html": HTMLType,
 	".doc":  OfficeType,
 	".docx": OfficeType,
diff --git a/app/handlers_test.go b/app/handlers_test.go
index 63a61e07..13059eb6 100644
--- a/app/handlers_test.go
+++ b/app/handlers_test.go
@@ -114,11 +114,26 @@ func TestConvertHandler(t *testing.T) {
 		t.Errorf("Handler returned a wrong status code: got %v want %v", status, http.StatusInternalServerError)
 	}
 
-	// case 4: sends a request with two files.
+	// case 3: sends two requests (almost) simultany.
 	path, _ = filepath.Abs("../_tests/configurations/gotenberg.yml")
 	appConfig, _ = config.NewAppConfig(path)
 	process.Load(appConfig.CommandsConfig)
 
+	/*sum := 0
+	for sum < 2 {
+		go func() {
+			path, _ := filepath.Abs("../_tests/file.docx")
+			req := makeRequest(path)
+			rr := httptest.NewRecorder()
+			h.ServeHTTP(rr, req)
+			if status := rr.Code; status != http.StatusInternalServerError {
+				t.Errorf("Handler returned a wrong status code: got %v want %v", status, http.StatusInternalServerError)
+			}
+		}()
+		sum++
+	}*/
+
+	// case 4: sends a request with two files.
 	oPath, _ = filepath.Abs("../_tests/file.docx")
 	path, _ = filepath.Abs("../_tests/file.pdf")
 	req = makeRequest(oPath, path)
diff --git a/orbit.yml b/orbit.yml
index 6acf85b1..974f0d8b 100644
--- a/orbit.yml
+++ b/orbit.yml
@@ -16,7 +16,7 @@ tasks:
     short: Runs CI process inside a container
     run:
       - docker build -t gotenberg:ci -f Dockerfile.ci .
-      - docker run --rm -e "VERSION={{ .Orbit.Version }}" -v "$(pwd)/.ci:/go/src/github.com/thecodingmachine/gotenberg/.ci" -v "$(pwd)/.build:/go/src/github.com/thecodingmachine/gotenberg/.build" gotenberg:ci
+      - docker run --rm -e "VERSION={{ .Orbit.Version }}" -v "$(pwd)/.ci:/go/src/github.com/thecodingmachine/gotenberg/.ci" gotenberg:ci
 
   - use: build
     short: Builds the main Docker image