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Velocity diffusion of electrons placed in strong Langmuir turbulence has been numerically investigated. The velocity variance initially exhibits quasi-linear behavior followed by non-Markovian subdiffusive phase in agreement with the previous theoretical predictions. However, the subdiffusive phase is also transient and a well defined diffusive phase with a constant diffusivity emerges. The asymptotic diffusivity scales as √σ where σ is the RMS amplitude of the turbulent electric potential.