diff --git a/Dockerfile b/Dockerfile
index baa9eacb2c1ebe7af6a6c9fb773f63270a82572c..cc163f91ef07b3c91443283476ab8b3be92b5a1a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,18 @@
-FROM ubuntu:20.04
+FROM debian:bullseye
 
 # Install build tools for sdptr and the C language OPC-UA lib
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y software-properties-common && \
-    DEBIAN_FRONTEND=noninteractive add-apt-repository ppa:open62541-team/ppa && \
     apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y autoconf automake git make g++ build-essential pkg-config libboost-dev libboost-regex-dev libboost-system-dev libboost-program-options-dev libopen62541-1-dev libopen62541-1-tools zlib1g-dev && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y autoconf automake git cmake make g++ build-essential pkg-config libboost-dev libboost-regex-dev libboost-system-dev libboost-program-options-dev zlib1g-dev && \
     apt-get clean
 
+RUN git clone -b v1.3.4 https://github.com/open62541/open62541 
+RUN cd open62541 && git submodule update --init --recursive && \
+    mkdir build -p && cd build/ && cmake .. && make -j 4 && make install
+# Remove source
+RUN rm -rf open62541
+
 # Copy sdptr
 COPY . /sdptr
 
@@ -18,11 +23,14 @@ RUN cd /sdptr && \
     bash -c "make -j `nproc` install"
 
 # Remove source
-RUN rm -rf /sdptr
+# RUN rm -rf /sdptr
 
 # Remove build dependencies
-RUN DEBIAN_FRONTEND=noninteractive apt-get purge -y autoconf automake git make g++ build-essential libboost-dev libboost-regex-dev libboost-system-dev libboost-program-options-dev
+RUN DEBIAN_FRONTEND=noninteractive apt-get purge -y autoconf automake git cmake make g++ build-essential libboost-dev libboost-regex-dev libboost-system-dev libboost-program-options-dev
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get autoremove -y
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get clean
+
+WORKDIR /sdptr/src
+CMD ["sdptr", "--ip_prefix=127.0.", "--nodaemon"]
diff --git a/src/opcua/ua_server.cpp b/src/opcua/ua_server.cpp
index 58bcb8e7f26d37bfeaba0ab27c67868ea2b191b1..c43737252587b89e2522b33985d46ccea34ada4f 100644
--- a/src/opcua/ua_server.cpp
+++ b/src/opcua/ua_server.cpp
@@ -983,14 +983,14 @@ static void ua_add_Variable_boolean(UA_Server *server, const string regname, con
     UA_Boolean *values = NULL;
     if (is_scalar)
     {
-        // LOG_F(INFO, "ua_add_variable_boolean scalar: regname=%s size=%u perm=%s", regname.c_str(), size, perm.c_str());
+        LOG_F(INFO, "ua_add_variable_boolean scalar: regname=%s size=%u perm=%s", regname.c_str(), size, perm.c_str());
         UA_Boolean value = UA_Boolean(false);
         UA_Variant_setScalar(&vattr.value, &value, &UA_TYPES[UA_TYPES_BOOLEAN]);
         vattr.valueRank = UA_VALUERANK_SCALAR;
     }
     else
     {
-        // LOG_F(INFO, "ua_add_variable_boolean array: regname=%s size=%u perm=%s", regname.c_str(), size, perm.c_str());
+        LOG_F(INFO, "ua_add_variable_boolean array: regname=%s size=%u perm=%s", regname.c_str(), size, perm.c_str());
         vattr.valueRank = UA_VALUERANK_ONE_DIMENSION;
 
         UA_UInt32 myArrayDimensions[1] = {(uint32_t)size};
@@ -1008,8 +1008,8 @@ static void ua_add_Variable_boolean(UA_Server *server, const string regname, con
         vattr.value.arrayDimensions = myArrayDimensions;
         vattr.value.arrayDimensionsSize = 1;
         
-        // LOG_F(INFO, "vattr.value: arrayDimensions=%u arrayDimensionsSize=%u arrayLength=%u", 
-                    //  (uint32_t)vattr.value.arrayDimensions[0], (uint32_t)vattr.value.arrayDimensionsSize, (uint32_t)vattr.value.arrayLength);
+        LOG_F(INFO, "vattr.value: arrayDimensions=%u arrayDimensionsSize=%u arrayLength=%u", 
+                     (uint32_t)vattr.value.arrayDimensions[0], (uint32_t)vattr.value.arrayDimensionsSize, (uint32_t)vattr.value.arrayLength);
     }
 
     UA_DataSource DataSource;
diff --git a/test/c/ua_client/client.c b/test/c/ua_client/client.c
index bbf988f286cd187bf7f8b022d272f231c8445d40..cc6597cc0db621059a20b1bb95040ed4f8e06b2d 100644
--- a/test/c/ua_client/client.c
+++ b/test/c/ua_client/client.c
@@ -52,7 +52,7 @@ int main(int argc, char *argv[]) {
 
     /* Connect to a server */
     /* anonymous connect would be: retval = UA_Client_connect(client, "opc.tcp://localhost:4840"); */
-    retval = UA_Client_connect_username(client, "opc.tcp://localhost:4840", "user1", "password");
+    retval = UA_Client_connectUsername(client, "opc.tcp://localhost:4840", "user1", "password");
     if(retval != UA_STATUSCODE_GOOD) {
         UA_Client_delete(client);
         return EXIT_FAILURE;