diff a/gsm_receive_rtl.py b/gsm_receive_rtl.py
16c16
< from gnuradio import gr, gru, eng_notation, blks2, optfir
---
> from gnuradio import gr, gru, eng_notation, blocks, filter
57c57
<     self.converter = gr.vector_to_stream(gr.sizeof_float, 142)
---
>     self.converter = blocks.vector_to_stream(gr.sizeof_float, 142)
62c62
<     self.src = osmosdr.source_c(options.args)
---
>     self.src = osmosdr.source(options.args)
85,86c85,86
<     taps = gr.firdes.low_pass(1.0, sample_rate, 145e3, 10e3, gr.firdes.WIN_HANN)
<     self.tuner = gr.freq_xlating_fir_filter_ccf(1, taps, self.offset, sample_rate)
---
>     taps = filter.firdes.low_pass(1.0, sample_rate, 145e3, 10e3, filter.firdes.WIN_HANN)
>     self.tuner = filter.freq_xlating_fir_filter_ccf(1, taps, self.offset, sample_rate)
88c88
<     self.interpolator = gr.fractional_interpolator_cc(0, sps)
---
>     self.interpolator = filter.fractional_interpolator_cc(0, sps)
95c95
<     self.output = gr.file_sink(gr.sizeof_float, options.output_file)
---
>     self.output = blocks.file_sink(gr.sizeof_float, options.output_file)