diff --git a/CppTester.h b/CppTester.h
index dfef84e..f5c1c87 100644
--- a/CppTester.h
+++ b/CppTester.h
@@ -75,7 +75,6 @@ class CppTester {
             } else if(subtype == "extract") {
                 result["type"] = "GROUP";
                 result["result"]["columns"] = json();
-
             }
             smatch match;
             bool first = true;
@@ -109,12 +108,13 @@ class CppTester {
             }
         } else if(test_type == "search") {
             result["type"] = "GROUP";
+            result["result"]["columns"] = json::array();
             smatch match;
             bool first = true;
 
             for(string test_string: test_strings) {
                 json groups_list;
-                groups_list["list"] = json();
+                groups_list["list"] = json::array();
                 
                 string temp_string = test_string;
                 while(regex_search(temp_string, match, pattern, (match_flag_type) match_flags)) {
diff --git a/Dockerfile b/Dockerfile
index f778bf4..0157fed 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,19 @@
 FROM regexpress/base:latest
 
 COPY CppTester.cpp /root
-
+COPY CppTester.h /root
 COPY CppTesterTest.cpp /root
+COPY json.hpp /root
 
 RUN apk update && \
     apk add --no-cache --virtual .build-deps g++=5.3.0-r0 && \
     cd /root && \
     g++ -std=c++11 CppTester.cpp -o CppTester && \
     g++ -std=c++11 CppTesterTest.cpp -o CppTesterTest && \
-    echo "arg=();for var in \"\$@\";do arg+=(\$(echo -n \"\$var\" | base64 -d)); done; ./CppTester \"\${arg[@]}\"" > run.sh && \
+    echo "arg=();for var in \"\$@\";do arg+=(\"\$(echo -n \"\$var\" | base64 -d)\"); done; /root/CppTester \"\${arg[@]}\"" > run.sh && \
     chmod 755 run.sh && \
-    apk del .build-deps
+    apk del .build-deps && \
+    apk add --no-cache libstdc++ && \
     rm -rf /tmp/*
     
 ENTRYPOINT ["/bin/bash", "/root/run.sh"]
\ No newline at end of file
diff --git a/run.sh b/run.sh
deleted file mode 100644
index 1474fd4..0000000
--- a/run.sh
+++ /dev/null
@@ -1 +0,0 @@
-arg=();for var in "$@";do arg+=($(echo -n "$var" | base64 -d)); done; node /root/JavascriptTester.js "${arg[@]}"